1. Most kidney stones are usually in the form of which among the following?
A
Sodium nitrate
B
Zinc oxide
C
Calcium oxalate
D
None of these
Correct Answered :
Wrong Answered :
2. Which among the following causes Typhoid?
A
Anopheles
B
Tubercule bacillli
C
Variola virus
D
Salmonella typhi
Typhoid fever is caused by a type of bacteria called Salmonella typhi
Correct Answered :
Wrong Answered :
3. Most toxic metal pollutant of automobile exhaust is which of the following?
A
Cadmium
B
Lead
C
Copper
D
None of these
Lead
Correct Answered :
Wrong Answered :
4. Which among the following is also called index of refraction, measure of the bending of a ray of light when passing from one medium into another?
A
Amplitude
B
velocity
C
Refractive index
D
None of these
refractive index,
also called index of refraction, measure of the bending of a ray of
light when passing from one medium into another.
Correct Answered :
Wrong Answered :
5. Which among the following is/are good conductor of electricity?
A
Graphite
B
Copper
C
Silver
D
All of these
All of these
Correct Answered :
Wrong Answered :
6. Which of the following processes does not add CO2 to the atmosphere?
A
Volcanic eruption
B
Organic matter decay
C
Photosynthesis
D
All of these
Correct Answered :
Wrong Answered :
7. ____ is the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane.
A
Transpiration
B
Osmosis
C
Diffusion
D
Penetration
Correct Answered :
Wrong Answered :
8. The infertile Saline soils contain largely proportion of which of the following?
A
Zinc, Sodium and Magnesium
B
Copper, Sodium and Potassium
C
Sodium, Potassium and Magnesium
D
Bronze, Magnesium and Sulphur
Correct Answered :
Wrong Answered :
9. The saliva contains an enzyme called ____ that breaks down carbohydrates which is a complex molecule to give sugar.
A
isomerase
B
sucrase
C
kinase
D
salivary
Correct Answered :
Wrong Answered :
10. During sleep, the blood pressure of human beings _____
A
Increase
B
Decrease
C
First decrease and then increase
D
Remain same
Decrease
Correct Answered :
Wrong Answered :
11. Naphthalene is a volatile solid and is best purified by which of the following?
A
Crystallisation
B
Distillation
C
Steam distillation
D
Sublimation
Naphthalene, being a subliming solid, is purified by sublimation.
Correct Answered :
Wrong Answered :
12. Different substances have different vapor pressures at a given temperature due to the strength of their ____
A
aerosol
B
intermolecular forces
C
allotrope
D
both aerosol and allotrope
Correct Answered :
Wrong Answered :
13. Which of the following is the function of kidney?
A
extract waste from blood
B
maintain blood supply
C
keep blood sarm
D
None of these
Correct Answered :
Wrong Answered :
14. Black carbon is another name for
A
Soot
B
Smog
C
Smoke
D
Ozone
The term black carbon is sometimes used as a synonym for both the elemental and graphitic component of soot.
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Wrong Answered :
15. Which of the following is the colorless and odorless air pollutant?
A
Sulphur Dioxide
B
Carbon Monoxide
C
Ozone
D
Nitrous Oxide
Correct Answered :
Wrong Answered :
16. Which of the following is the commercial unit of electric energy which is commonly known as units in electricity bills
A
kilowatt hour (kwh)
B
ampere (Ah)
C
voltage (Vh)
D
watt (Wh)
Commercial unit of electrical energy is kWh (kilowatt-hour). It is defined as energy consumed by an appliance of 1kW when it is used for one hour.
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17. Chloroform is slowly oxidised by air in the presence of light to form an extremely poisonous gas knows as ____
A
Freon
B
Carbon tetrachloride
C
Methylene chloride
D
Phosgene
Correct Answered :
Wrong Answered :
18. In which city, India`s first indigenously developed Hydrogen Fuel Cell Bus has been inaugurated.
A
Banglore
B
Ahmedabad
C
Pune
D
Noida
Pune
Correct Answered :
Wrong Answered :
19. Find the odd one out from the given options?
A
Mobile
B
Glucometer
C
Television
D
Radio
Glucometer
Correct Answered :
Wrong Answered :
20. Which of the following bacteria form Curd from milk?
A
Lactobacillus
B
Streptococcus
C
Staphylococcus
D
Yeast
Correct Answered :
Wrong Answered :
21. On what among the following factors does the resistance of wire depend?
A
directly proportional to the length of the conduction
B
inversely proportional to the cross sectional area of the conductor
C
depends on the material of the conductor
D
All of these
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Wrong Answered :
22. If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of which among the following?
A
Evaporation
B
Precipitation
C
Sublimation
D
None of these
Correct Answered :
Wrong Answered :
23. Which among the following is the causal organism of chikenpox?
A
Varicella Zoster Virus
B
Antamoeba Histolytica
C
Vibrio Cholerae
D
Bacills Typhosus
Chickenpox is a highly contagious disease caused by the varicella-zoster virus (VZV).
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Wrong Answered :
24. The following question consists of two words that have a certain relationship to each other.
Choose the correct alternative that has the same relationship as the original pair has
Poles : Magnet :: ? : Battery
A
Tracks
B
Distance
C
Joule
D
Terminals
Terminals
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Wrong Answered :
25. Which of the following does hard water contain?
A
Iron
B
Calcium
C
Phosphorus
D
Potassium
Correct Answered :
Wrong Answered :
26. The cells that line the small intestine release additional enzymes that finally break apart the smaller protein fragments into the individual ____
A
Carbohydrates
B
Vitamins
C
Fats
D
Amino Acids
Correct Answered :
Wrong Answered :
27. Which among the following is combined with oxygen in the cells and produces CO2 and water during respiration?
A
Sucrose
B
Fructose
C
Glucose
D
Lactose
Glucose
Correct Answered :
Wrong Answered :
28. From the given options, Fill in the blank
If Seismograph is related to Earthquake the, Taseometer is related to ___
A
Volcano
B
Stress
C
Current
D
None of these
Stress
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Wrong Answered :
29. Which of the following is the unit of nervous tissue?
A
Axone
B
Neuron
C
Gangelion
D
Cell body
Neuron or nerve cell.
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Wrong Answered :
30. Which of the following chemical is used as antidote to cyanide poisoning, a nephroprotective agent and a antifungal drug?
A
sodium thiosulfate
B
barium hudroxide
C
blue vitriol
D
epsom salt
Correct Answered :
Wrong Answered :
31. BGG vaccination is given to prevent against which of the following diseases?
A
Tuberculosis
B
Typhoid
C
Herpes
D
AIDS
Correct Answered :
Wrong Answered :
32. What will be the image formation by a convex mirror when object is at infinity?
A
virtual and inverted
B
real and erect
C
real and inverted
D
virtual and erect
Image formation by a convex mirror when an object is placed at infinity: The image formed is virtual and erect.
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Wrong Answered :
33. Which among the following can perform photosynthesis?
A
Cyanobacteria
B
Fungi
C
Human
D
None of these
Some plants, green algae, and cyanobacteria can perform photosynthesis.
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Wrong Answered :
34. To increase the solubility of CO2 in soft drinks and soda water, the bottle is sealed under which of the following condition?
A
High pressure
B
Low pressure
C
Zero pressure
D
None of these
Correct Answered :
Wrong Answered :
35. Which of the following is the major pollinator?
A
Butterflies
B
Moths
C
Wasps
D
Honeybees
Correct Answered :
Wrong Answered :
36. which of the following acid is produced by our stomach which help in digestion?
A
Sulphuric acid
B
Nitric acid
C
Ascorbic acid
D
Hydrochloric acid
The stomach produces Hydrochloric acid . Hydrochloric acid helps in the digestion of food without any side effects on the stomach.
Correct Answered :
Wrong Answered :
37. Which among the following are the principal constituents of petroleum and natural gas?
A
Allotropes
B
Hydrocarbons
C
Photolysis
D
Amorphous
Hydrocarbons
Correct Answered :
Wrong Answered :
38. Which of the following is the most commonly used disinfectant in water purification?
A
Chlorine
B
Ozone
C
Mercury
D
Nitrogen
Chlorine and chloramine are the major disinfectants used in public water systems.
Correct Answered :
Wrong Answered :
39. Which of the following do not come under the Cetaceans group of species?
A
Fish
B
Whales
C
Porpoises
D
Dolphins
Fish
Correct Answered :
Wrong Answered :
40. Which of the following has Fruity smell?
A
Esters
B
Alcohols
C
Chloroform
D
Acid anhydride
Esters
Correct Answered :
Wrong Answered :
41. Which of the following is the full form of RNA?
A
red blood corpuscles
B
ribosomes
C
ribonucleic acid
D
none of these
ribonucleic acid
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Wrong Answered :
42. Which among the following is the causal organism for COVID-19?
A
Bacteria
B
Virus
C
Protozoa
D
Fungi
Virus
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Wrong Answered :
43. What is the ability used by some animals to emit high-pitched sounds and determine an object`s distance?
A
Magnetoreception
B
Soundcall
C
Echolocation
D
None of these
Correct Answered :
Wrong Answered :
44. Why does the clear sky appear blue?
A
blue light gets absorbed in the atmosphere
B
ultraviolet radiations are absorbed in the atmosphere
C
the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible
D
light of all other colours is scattered more than the violet and blue colour lights by the atmosphere
The sky appears blue on a clear day because of the scattering of blue component of white sunlight by air molecules presents in the atmosphere. When sunlight passes through the atmosphere, most of the longer wavelength lights do not get scattered much and hence pass straight through the atmosphere.
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45. Which among the following is a clear, colourless, viscous, sweet-tasting liquid belonging to the alcohol of organic compounds?
A
Ethyl alcohol
B
Sodium Chloride
C
Glycerol
D
Oxalic Acid
glycerol, a clear, colourless, viscous, sweet-tasting liquid belonging to the alcohol family of organic compounds; molecular formula HOCH2CHOHCH2OH.
Correct Answered :
Wrong Answered :
46. Which of the following is true
1. Water with high salinity is denser than water with low salinity
2. Cold water is denser than warm water
A
Only 1
B
Only 2
C
Both 1 and 2
D
None of these
Both 1 and 2
Correct Answered :
Wrong Answered :
47. Which of the following is correctly matched?1. Richter scale - Magnitude2. Mercalli scale - Intensity3. Intensity scale range - 1 to 12
A
only 1
B
only 2
C
1 and 2
D
1, 2 and 3
1, 2 and 3
Correct Answered :
Wrong Answered :
48. If in a concave mirror, the object is placed beyond the centre of curvature C, the size of the image will be ____.
A
diminished
B
highly
C
enlarged
D
similar size
dimnished
Correct Answered :
Wrong Answered :
49. Which one of the following is a component of tear gas?
A
Methane
B
Methanol
C
Ether
D
Chloropicrin
Chloropicrin is a constituent of tear gas and is responsible for causing irritation.
Correct Answered :
Wrong Answered :
50. Find the Odd One Out from the following given option
A
Heart
B
Liver
C
Gloves
D
Kidney
Gloves
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Wrong Answered :
51. Which of the following is an essential trace element involved in the correct packing and storage of insulin?
A
Sodium
B
Nickel
C
Zinc
D
Phosphorus
Zinc is an essential trace element involved in the correct packing and storage of insulin. Total zinc content in the pancreatic β-cells is among the highest in the body and changes in the Zn(2+) levels have been found to be associated with diabetes.
Correct Answered :
Wrong Answered :
52. Which of the following is the largest bone found in human body?
A
Humerus
B
Radius
C
Femur
D
Sternum
The thigh bone (Femur) is almost 19.9 inches long and is the longest bone in the human body. It runes from the hip down to around the knee area.
Correct Answered :
Wrong Answered :
53. Which of the following deficiency of vitamin causes Rickets?
A
D
B
B
C
C
D
A
The most common cause of rickets is a lack of vitamin D or calcium in a diet. Both are essential for children to develop strong and healthy bones.
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Wrong Answered :
54. Which among the following is the chemical name of Plaster of Paris?
A
Sodium chloride
B
Calcium chloride
C
Calcium sulfate hemihydrate
D
None of these
Plaster of Paris is a fine white powder of calcium sulphate hemihydrate. The chemical formula of Plaster of Paris is CaSO4. 1/2H2O.
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Wrong Answered :
55. A ligament is a fibrous connective tissue that attaches ____, and usually serves to hold structures together and keep them stable.
A
Muscles to bone
B
Bone to Bone
C
Nerve to bone
D
Muscles to Muscles
A ligament is a fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable.
Correct Answered :
Wrong Answered :
56. For which of the following articles are Concave mirrors used ?
A
Shaving and Makeup Mirrors
B
Microscopes
C
Headlights
D
All of these
Shaving mirrors, Car headlight mirror, Searchlight mirror, Driving mirror, Dentist`s inspection mirror, Torch mirror, Staircase mirror in a double-decker bus, Make-up mirror, Solar furnace mirror, Satellite TV dish, Shop security mirror.
Correct Answered :
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57. Water available in soil for the root of plant is ____
A
Capillary Water
B
Gravitational Water
C
Hygroscopic Water
D
None of these
Capillary water is the main water that is available to plants as it is trapped in the soil right next to the roots of the plant.
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58. Which among the following process is associated with application of zinc coating to steel or iron to prevent rusting?
A
Galvanisation
B
Halogenation
C
Polycondensation
D
None of these
Galvanizing is the process of applying zinc coating to a more noble metal (popularly steel or iron) to prevent corrosion (rusting). Hot-dip galvanization is the most well-known method in which the steel part is submerged in a bath of molten zinc.
Correct Answered :
Wrong Answered :
59. What is the white of the eye called?
A
Retina
B
Sclera
C
Cornea
D
Iris
The sclera is the dense connective tissue of the eyeball that forms the "white" of the eye. It is continuous with the stroma layer of the cornea. The junction between the white sclera and the clear cornea is called the limbus.
The sclera ranges in thickness from about 0.3 millimeter (mm) to 1.0 mm. It is composed of fibrils (small fibers) of collagen that are arranged in irregular and interlacing bundles. The random arrangement and interweaving of these connective tissue fibers are what account for the strength and flexibility of the eyeball.
The sclera is relatively inactive metabolically and has only a limited blood supply. Some blood vessels pass through the sclera to other tissues, but the sclera itself is considered avascular (lacking blood vessels).
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60. Which of the following is a superconductor?
A
Ceramic
B
Air
C
Paper
D
Mercury
Superconductor material classes include chemical elements like mercury or lead, alloys such as niobium-titanium, germanium-niobium, and niobium nitride, or organic superconductors.
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Wrong Answered :
61. Lung cancer be be caused by which of the following hazardous substance?
A
Ozone
B
Nitrous Oxide
C
Asbestos Particulates
D
Mercury
62. Among the following, what is Cupric sulfate commercially known as?
A
Baking Soda
B
Blue Vitriol
C
Bleaching Powder
D
Gypsum
Cupric sulfate, CuSO4, commonly known as blue vitriol, is the most important salt of copper.
Correct Answered :
Wrong Answered :
63. CNG is a fuel gas which is mainly composed of methane that is used for vehicles in general. Here CNG stands for
A
Complex nitrous gas
B
certified national gas
C
compressed natural gas
D
coal and nucleotide gas
compressed natural gas
Correct Answered :
Wrong Answered :
64. Which of the following instruments is used to measure the blood pressure of the Human body?
A
Endoscope
B
Thermometer
C
Stethoscope
D
Sphygmomanometer
To measure blood pressure, your doctor uses an instrument call a sphygmomanometer, which is more often referred to as a blood pressure cuff. The cuff is wrapped around your upper arm and inflated to stop the flow of blood in your artery.
Correct Answered :
Wrong Answered :
65. What is the full form of MSG, a chief flavor enhancer used in the food industry?
A
Monosodium glycinate
B
Monosodium glutamate
C
Monosodium glutamine
D
Monosulphur glycerol
Monosodium glutamate (MSG) is a flavor enhancer commonly added to Chinese food, canned vegetables, soups and processed meats.
Correct Answered :
Wrong Answered :
66. Which of the following options is an example for chemical change?
A
Crystallization of salt
B
Evaporation
C
Burning of coal
D
Melting of ice
Burning of coal is a chemical change. When coal is burnt, the chief component, carbon is changed to carbon dioxide. This process cannot be reversed.
Correct Answered :
Wrong Answered :
67. Which of the following substances is usually used in cold countries to melt ice accumulated on the roads during winter?
A
Salt
B
Urea
C
Boric Acid
D
Hydrogen Peroxide
Rock salt or halite is the form of sodium chloride. Brine is a solution of water and salt has a lower freezing point than pure water putting salt or saltwater on ice that is near 0oC will cause it to melt. It is called as de-icing done after snowstorm to improve traction.
Correct Answered :
Wrong Answered :
68. Which of the following when added to pure water usually increases its surface tension?
A
Detergent
B
Sodium Chloride
C
Kerosene oil
D
Phenyl
The surface tension of water is increased when salt is added to it. Although the strong interactions between sodium cations and partial negative oxygen, and chloride anions and partial positive hydrogens disrupt some hydrogen bonding between water molecules, they actually strengthen the surface tension of water.
Correct Answered :
Wrong Answered :
69. The period of transition from childhood and adulthood is known as
A
Maturity
B
Courtship
C
Adulthood
D
Adolescence
Adolescence is the period of transition between childhood and adulthood. Children who are entering adolescence are going through many changes (physical, intellectual, personality and social developmental). Adolescence begins at puberty, which now occurs earlier, on average, than in the past.
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Wrong Answered :
70. The branch of Physics concerned with the properties of sound.
A
Rhythm
B
Resonance
C
Acoustics
D
Announce
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.
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71. The process of breaking molecules in the absence of oxygen is called ___________.
A
Photosynthesis
B
Aerobic Respiration
C
Anaerobic Respiration
D
Evapotranspiration
Anaerobic Respiration
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Wrong Answered :
72. What is the SI unit of the electric current?
A
Candela
B
Pascal
C
Mole
D
Ampere
Ampere
Correct Answered :
Wrong Answered :
73. Which is the most abundant gas in earth`s atmosphere?
A
Oxygen
B
Hydrogen
C
Carbon Dioxide
D
Nitrogen
Nitrogen
Correct Answered :
Wrong Answered :
74. Which of the following is an example of vector quantity?
A
Momentum
B
Mass
C
Volume
D
Speed
Momentum
Correct Answered :
Wrong Answered :
75. In Ozone, which layer is termed as "good ozone"?
A
Mesosphere
B
Troposphere
C
Exosphere
D
Stratosphere
Stratosphere
Correct Answered :
Wrong Answered :
76. Which of the following vitamins is also known as Thiamine?
A
Vitamin C
B
Vitamin B1
C
Vitamin B6
D
Vitamin B12
Thiamin (thiamine), or vitamin B1, is a water-soluble vitamin found naturally in some foods, added to foods, and sold as a supplement.
Correct Answered :
Wrong Answered :
77. Which of the following vitamin deficiencies causes Xerophthalmia?
A
Vitamin A
B
Vitamin E
C
Vitamin K
D
Vitamin B12
Vitamin A
Correct Answered :
Wrong Answered :
78. Which of the following is an example of mineral fuel?
A
Bauxite
B
Manganese
C
Mica
D
Coal
Coal
Correct Answered :
Wrong Answered :
79. Which type of energy source is solar energy?
A
Conventional
B
Non-Renewable
C
Non-Conventional
D
Exhaustible
Non-Conventional
Correct Answered :
Wrong Answered :
80. What is the atomicity of Helium?
A
2
B
1
C
8
D
3
Helium is a noble monoatomic gas and does not combine with other elements so it is a monoatomic gas and the atomicity is one
Correct Answered :
Wrong Answered :
81. Which of the following is an example of amorphous solid?
A
Mica
B
Quartz
C
Diamond
D
Rubber
Rubber
Correct Answered :
Wrong Answered :
82. Which of the following has the lowest frequency in an electromagnetic spectrum?
A
Gamma Rays
B
Micro Waves
C
Radio Waves
D
Alpha Waves
Radio Waves
Correct Answered :
Wrong Answered :
83. What is the SI unit of the wavelength?
A
Watt
B
Hertz
C
Metre
D
Second
Wavelength is a distance so the meter is the SI unit, but wavelengths are small so are typically given in nano meters
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Wrong Answered :
84. Which of the following particles has no electrical charge?
A
Positron
B
Electron
C
Neutron
D
Proton
Neutron
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Wrong Answered :
85. What is the chemical symbol of Sodium?
A
Au
B
Na
C
Pb
D
Ag
Na
Correct Answered :
Wrong Answered :
86. Which of the following processes denotes water soluble inorganic nutrients go down into the soil horizon and gets precipitated as unavailable salts?
A
Eutrophication
B
Fragmentation
C
Leaching
D
Biomagnification
Leaching
Correct Answered :
Wrong Answered :
87. Which of the following gas laws shows the relationship of volume and number of gas particles?
A
Avogadro Law
B
Gay Lussac`s Law
C
Charles Law
D
Boyle`s Law
Avogadro Law
Correct Answered :
Wrong Answered :
88. The electrical instrument rheostat is used to control electric current by varying the _________.
A
Resistance
B
Frequency
C
Capacitance
D
Inductance
Resistance
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Wrong Answered :
89. Autotrophic nutrition is found only in ________.
A
Fishes
B
Green Plants
C
Birds
D
Mammals
Green Plants
Correct Answered :
Wrong Answered :
90. Which of the following devices converts mechanical energy into electrical energy?
A
Battery
B
Solar Energy
C
Generator
D
Electrical Fuse
The device which converts mechanical energy into electrical energy.is Electric generator.
Correct Answered :
Wrong Answered :
91. Which of the following forms of energy is an example of a primary energy source?
A
Sun
B
Biofuels
C
Liquified Petroleum Gas (LPG)
D
Diesel
The Sun is the primary source of energy for Earth`s climate system is the first of seven Essential Principles of Climate Sciences. Principle 1 sets the stage for understanding Earth`s climate system and energy balance. The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible. Each second, more than four million tonnes of matter are converted into energy within the Sun`s core, producing neutrinos and solar radiation.
Correct Answered :
Wrong Answered :
92. Which of the following is an example of secondary electrical battery?
A
Leclanche cell
B
Nickel - Cadmium Battery
C
Dry Cell
D
Lithium Cell
Nickel - Cadmium Battery
Correct Answered :
Wrong Answered :
93. Which Newton`s law gives the relationship between force, mass and acceleration?
A
Newton`s Law of Cooling
B
Newton`s Second Law of Motion
C
Newton`s Third Law of Motion
D
Newton`s First Law of Motion
Newton`s Second Law of Motion
Correct Answered :
Wrong Answered :
94. Which of the following protocols is related to ozone layer depletion?
A
Montreal Protocol
B
Kyoto Protocol
C
Cartagena Protocol
D
Nagoya Protocol
Montreal Protocol
Correct Answered :
Wrong Answered :
95. Which of the following helps to translocate a variety of organic and inorganic solutes from the leaves to other parts of the plants?
A
Cortex
B
Pith
C
Phloem
D
Xylem
Phloem
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Wrong Answered :
96. Which of the following terms denotes the physical position and functional role of a species within the community?
A
Biomass
B
Ecological Pyramid
C
Ecological Niche
D
Ecotone
Ecological Niche
Correct Answered :
Wrong Answered :
97. Which of the following vitamin deficiencies causes rickets in children?
A
Vitamin K
B
Vitamin D
C
Vitamin C
D
Vitamin A
Vitamin D
Correct Answered :
Wrong Answered :
98. Which of the following states of matter has indefinite shape and indefinite volume?
A
Solid
B
Gas
C
Liquid
D
Plasma
Gas
Correct Answered :
Wrong Answered :
99. What is the SI unit of the thermodynamic temperature?
A
Ampere
B
Candela
C
Kelvin
D
Mole
Kelvin
Correct Answered :
Wrong Answered :
100. Which of the following pigments gives green colour to the leaves?
A
Nucleus
B
Cytoplasm
C
Chlorophyll
D
Mitochondria
Chlorophyll
Correct Answered :
Wrong Answered :
101. Which of the following waves is an example of longitudinal waves?
A
Ultrasonic Waves
B
Micro Waves
C
Light Waves
D
Infrared Waves
Ultrasonic Waves
Correct Answered :
Wrong Answered :
102. What is the atomicity of nitrogen?
A
3
B
8
C
1
D
2
2
Correct Answered :
Wrong Answered :
103. Which of the following type of solids are anisotropic in nature?
A
Amorphous Solid
B
Pseudo Solid
C
Super Cooled Liquid
D
Crystalline Solid
Crystalline Solid
Correct Answered :
Wrong Answered :
104. What is the scientific name of Vitamin B9?
A
Pyridoxine
B
Ascorbic Acid
C
Riboflavin
D
Folic Acid
Folic Acid
Correct Answered :
Wrong Answered :
105. What is the chemical symbol of Silver?
A
Au
B
K
C
Ag
D
Pb
Ag
Correct Answered :
Wrong Answered :
106. Which of the following laws states that for every action, there is an equal and opposite reaction?
A
Newton`s First Law of Motion
B
Newton`s Third Law of Motion
C
Newton`s Law of Cooling
D
Newton`s second Law of Motion
Newton`s Third Law of Motion
Correct Answered :
Wrong Answered :
107. What is the second layer of the earth`s atmosphere?
A
Exosphere
B
Mesosphere
C
Troposphere
D
Stratosphere
Stratosphere
Correct Answered :
Wrong Answered :
108. In which of the following medium sound travels faster?
A
Solid
B
Fluid
C
Gas
D
Liquid
Solid
Correct Answered :
Wrong Answered :
109. Which of the following is an example of ferrous mineral?
A
Graphite
B
Manganese
C
Gold
D
Mica
Manganese
Correct Answered :
Wrong Answered :
110. Which of the following devices is used to measure potential difference between two points in a circuit?
A
Voltmeter
B
Galvanometer
C
Pycnometer
D
Ammeter
Voltmeter
Correct Answered :
Wrong Answered :
111. Which of the following vitamin deficiencies causes scurvy?
A
Vitamin C
B
Vitamin K
C
Vitamin E
D
Vitamin A
Vitamin C
Correct Answered :
Wrong Answered :
112. Mole is the SI unit of ____
A
Luminous Intensity
B
Electric Current
C
Thermodynamic Temperature
D
Amount of Substance
Amount of Substance
Correct Answered :
Wrong Answered :
113. The relationship between which two gas variables are shown in Charles law?
A
Pressure - Temperature
B
Temperature - Volume
C
Pressure - Volume
D
Volume - Number of Gas Particles
Temperature - Volume
Correct Answered :
Wrong Answered :
114. In which continent is ozone hole found for the first time?
A
South America
B
Africa
C
Antarctica
D
North America
Antarctica
Correct Answered :
Wrong Answered :
115. On which quantum number does the orientation of atomic orbitals depend?
A
Principal Quantum Number
B
Azimuthal Quantum Number
C
Magnetic Quantum Number
D
Spin Quantum Number
Magnetic Quantum Number
Correct Answered :
Wrong Answered :
116. Which of the following is known as black gold?
A
Petroleum
B
Coal
C
Wood
D
Biofuel
The Petroleum is called black gold because when the crude oil is extracted from the soil below, it is black in colour.
Correct Answered :
Wrong Answered :
117. The amount of electric current flowing per unit area is called ___
A
Current Density
B
Electrical Resistivity
C
Electrical Power
D
Electric Potential
Current Density
Correct Answered :
Wrong Answered :
118. Light year is the unit of measurement of ___
A
Time
B
Acceleration
C
Velocity
D
Distance
Distance
Correct Answered :
Wrong Answered :
119. Which of the following group of animals get nutrition by feeding on both plants and animals?
A
Carnivores
B
Omnivores
C
Autotrophs
D
Herbivores
Omnivores
Correct Answered :
Wrong Answered :
120. Which of the following terms denotes the decomposed organic matter?
A
Humus
B
Litter
C
Explant
D
Callus
Humus
Correct Answered :
Wrong Answered :
121. The process of removal of metabolic waste from the body is known as ______
A
Gastrulation
B
Excretion
C
Photosynthesis
D
Digestion
Excretion
Correct Answered :
Wrong Answered :
122. In which layer of the earth`s atmosphere do precipitation occur?
A
Mesosphere
B
Exosphere
C
Stratosphere
D
Troposphere
Troposphere
Correct Answered :
Wrong Answered :
123. Which of the following states of matter has the strongest intermolecular forces?
A
Plasma
B
Gas
C
Liquid
D
Solid
Solid
Correct Answered :
Wrong Answered :
124. What is the chemical symbol of Iron?
A
In
B
Cu
C
Ir
D
Fe
Fe
Correct Answered :
Wrong Answered :
125. Which of the following quantities is conserved in Bernoulli`s theorem?
A
Linear Momentum
B
Weight
C
Energy
D
Angular Momentum
Energy
Correct Answered :
Wrong Answered :
126. Which type of energy source is tidal energy?
A
Non-Renewable
B
Conventional
C
Exhaustible
D
Non-Conventional
Non-Conventional
Correct Answered :
Wrong Answered :
127. Which of the following vitamins is also known as Ascorbic Acid?
A
Vitamin C
B
Vitamin B1
C
Vitamin B2
D
Vitamin B6
Vitamin C
Correct Answered :
Wrong Answered :
128. Which of the following radiations has the highest penetrating power?
A
Infrared Radiation
B
Alpha Radiation
C
Gamma Radiation
D
Beta Radiation
Gamma Radiation
Correct Answered :
Wrong Answered :
129. Which of the following quantities has only magnitude?
A
Momentum
B
Speed
C
Velocity
D
Force
Speed
Correct Answered :
Wrong Answered :
130. Sudden increase in temperature during the day is prevented by the
A
Atmosphere
B
Clouds
C
Rain
D
Acid Rain
A
Correct Answered :
Wrong Answered :
131. A coil with 25 turns and 2 cm length is passed in 1 second over a bar magnet`s north pole and pulled away in 0.5 sec through the same distance. What will you observe?
A
The current induced in the coil is highest when the coil is moved parallel to the magnetic field.
B
The current induced in the coil is highest when the coil is moved at an angle of 45 degrees to the magnetic field to the magnetic field.
C
The current induced in the coil is highest when the coil is moved perpendicular to the magnetic field.
D
The current induced in the coil is lowest when the coil is moved perpendicular to the magnetic field
The current induced in the coil is highest when the coil is moved perpendicular to the magnetic field.
Correct Answered :
Wrong Answered :
132. Which one of the following statements holds true for a human being?
A
About 12% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers
B
About 2% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers
C
About 10% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers
D
About 22% of all the food consumed by it gets converted to its body mass and is made available for the next level of consumers
C
Correct Answered :
Wrong Answered :
133. As per the rules of operations on scalars which of the following statements isnot correct about vectors in the context of Physical quantities?
A
Any two arbitrary vectors can be multiplied
B
Any arbitrary vector can be multiplied by an arbitrary scalar
C
Any two arbitrary vectors can be added if they have the same units
D
None of these
C
Correct Answered :
Wrong Answered :
134. The solar energy reaching unit area at outer edge of the earth`s atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and earth is known as
A
Thermal power
B
Solar constant
C
Voltaic coefficient
D
Energy coefficient
B
Correct Answered :
Wrong Answered :
135. Biological magnification refers to
A
the increase in the concentration of toxin as we move to the top of food web
B
the micro and macro organisms that live in an ecosystem
C
The number of levels in the food web
D
the system of consumption of various foods
A
Correct Answered :
Wrong Answered :
136. Longitudinal waves with amplitude A=0.1 can be propagated through fluids and solids with volume 2.0 m because
A
Fluids and solids have bulk modulus
B
Fluids have shear modulus and solids have bulk modulus
C
They both possess shear modulus
D
Fluids have bulk modulus and solids have shear modulus
A
Correct Answered :
Wrong Answered :
137. Carbon and energy requirements of the autotrophic organism are fulfilled b
A
Transpiration
B
Digestion
C
Respiration
D
Photosynthesis
D
Correct Answered :
Wrong Answered :
138. A particle moves on X-axis starting from x=1.0 If the particle moves 5.0 units in the positive direction and 3.0 units in the negative direction, then the displacement d is given by the expression
A
d=5.0+3.0
B
d=5.0-3.0
C
d=5.0+3.0-1.0
D
d=5.0-3.0-1.0
B
Correct Answered :
Wrong Answered :
139. Which one of the following is true for ozone?
A
Ozone is a deadly poison
B
Ozone is not harmful
C
Ozone is essential for all aerobic forms of life
D
Ozone is essential for the metabolic activities of plants
A
Correct Answered :
Wrong Answered :
140. Firewood has low heat content per kg of its mass. Which one of the following technologies can be used to convert firewood to a better source of energy?
A
Converting it into fossil fuel
B
Burning it in limited supply of oxygen
C
Converting it into bio gas
D
Converting it into ash
B
Correct Answered :
Wrong Answered :
141. Which isotope is used for the treatment of cancer
A
Radium
B
Cobalt
C
Iodine
D
Uranium
B
Correct Answered :
Wrong Answered :
142. Which of the following organisms derives its nutrition directly from other organisms?
A
Leech
B
Aspergillus
C
Paramecium
D
None of these
A
Correct Answered :
Wrong Answered :
143. During the process of photosynthesis in a neem tree, the first step is
A
Absorption of light energy by chlorophyll
B
Reduction of carbon dioxide to Carbohydrates
C
splitting of water molecules in hydrogen and oxygen
D
Conversion of light energy to chemical energy
A
Correct Answered :
Wrong Answered :
144. Deficiency of Vitamin D causes
A
Rickets
B
Night Blindness
C
Scurvy
D
Beri-Beri
A
Correct Answered :
Wrong Answered :
145. Uptake of Nitrogen in the Neem tree is in the form of
A
Organic compounds prepared by bacteria from atmospheric nitrogen.
B
Nitrous oxide through gaseous exchange from stomata of the plant
C
Nitric oxide through gaseous exchange from stomata of the plant
D
Nitrous oxide through roots of the plant
A
Correct Answered :
Wrong Answered :
146. The solid or liquid particles suspended in the air are called
A
Acid
B
Hydrocarbons
C
Aerosols
D
Water
C
Correct Answered :
Wrong Answered :
147. Which of the following is NOT a communicable disease?
A
Epilepsy
B
Rabies
C
Pertussis
D
Shegellosis
Epilepsy is a central nervous system (neurological) disorder in which brain activity becomes abnormal, causing seizures or periods of unusual behavior, sensations and sometimes loss of awareness. Anyone can develop epilepsy. Epilepsy affects both males and females of all races, ethnic backgrounds and ages.
Correct Answered :
Wrong Answered :
148. The hormone released by the pineal gland that regulates the sleep-wake cycle is called _______.
A
Melatonin
B
Serotonin
C
Morphine
D
Oxytocin
149. Ammeter is used to measure _______ flow in the device.
A
Force
B
Voltage
C
Current
D
Resistance
150. Which of the following is known as amphibians of the plant kingdom?
A
Angiopserm
B
Pteridophyte
C
Gymnosperm
D
Bryophyte
Bryophyte
Correct Answered :
Wrong Answered :
151. Which among the following has the lowest calorific value?
A
Wood
B
Hydrogen
C
Kerosene
D
Petrol
Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions.
Wood has the lowest calorific value which is 18,000 kJ/kg
Correct Answered :
Wrong Answered :
152. What is the value of absolute zero temperature in Kelvin scale?
A
- 273.15 K
B
0 K
C
- 100 K
D
- 459.69 K
Absolute zero, technically known as zero kelvins, equals −273.15 degrees Celsius, or -459.67 Fahrenheit, and marks the spot on the thermometer where a system reaches its lowest possible energy, or thermal motion.
Absolute zero on Kelvin scale is 0K , the lowest temperature possible .
Correct Answered :
Wrong Answered :
153. At which place on earth the value of gravity is maximum?
A
Tropic of Capricorn
B
Equator
C
Poles
D
Tropic of Cancer
Poles
Correct Answered :
Wrong Answered :
154. What is the source of formic acid?
A
Ant
B
Tomato
C
Ginger
D
Apple
155. Anaerobic decomposition is carried out in absence of ___
A
Carbon Dioxide
B
Oxygen
C
Hydrogen
D
Methane
Oxygen
Correct Answered :
Wrong Answered :
156. Which of the following instruments is used to measure the speed of wind?
A
Anemometer
B
Seismometer
C
Barometer
D
Hydrometer
Anemometer
Correct Answered :
Wrong Answered :
157. Which of the following is an example of simple permanent tissue in plants?
A
Sclerenchyma
B
Phloem
C
Sieve Tube
D
Xylem
Sclerenchyma
Correct Answered :
Wrong Answered :
158. Lanthanides belongs to which block of elements in the modern periodic table?
A
s-block
B
f-block
C
p-block
D
d-block
f-block
Correct Answered :
Wrong Answered :
159. In which of the following population interaction, both species get harmed?
A
Parasitism
B
Commensalism
C
Amensalism
D
Competition
Competition
Correct Answered :
Wrong Answered :
160. Basic solution turns red litmus paper into which colour?
A
White
B
Black
C
Green
D
Blue
Blue
Correct Answered :
Wrong Answered :
161. Which of the following layers lies immediately above the troposphere?
A
Stratosphere
B
Thermosphere
C
Mesosphere
D
Ionosphere
Stratosphere
Correct Answered :
Wrong Answered :
162. Which of the following countries is known as Country of Winds?
A
Denmark
B
India
C
Argentina
D
England
Denmark
Correct Answered :
Wrong Answered :
163. Which of the following tides has the least difference between high and low tides?
A
Ebb Tide
B
Flood Tide
C
Spring Tide
D
Neap Tide
Neap Tide
Correct Answered :
Wrong Answered :
164. Land breeze is an example of which type of heat transfer mechanism?
A
Convection
B
Insulation
C
Conduction
D
Radiation
Convection
Correct Answered :
Wrong Answered :
165. The property of metals by which they can be beaten into thin sheets is called _
A
Malleability
B
Ductility
C
Luster
D
Sonorous
Malleability
Correct Answered :
Wrong Answered :
166. Which of the following animals is an example of viviparous?
A
Human
B
Penguin
C
Hen
D
Octopus
Human
Correct Answered :
Wrong Answered :
167. Which of the following types of radiation does earth emit?
A
Ultraviolet
B
Gamma
C
Visible
D
Infrared
Infrared
Correct Answered :
Wrong Answered :
168. Which of the following is an example of noble metal?
A
Tin
B
Platinum
C
Nickel
D
Iron
Platinum
Correct Answered :
Wrong Answered :
169. In human blood, the haemoglobin is present in ___
A
White Blood Cells (WBC)
B
Red Blood Cells (RBC)
C
Platelets
D
Lymph
Red Blood Cells (RBC)
Correct Answered :
Wrong Answered :
170. Magnetite is an ore of which metal?
A
Iron
B
Aluminium
C
Zinc
D
Copper
Iron
Correct Answered :
Wrong Answered :
171. The Kigali agreement aims to phase out which of the following gases?
A
Hydrofluorocarbons
B
Nitrogen
C
Inert Gases
D
Oxygen
Hydrofluorocarbons
Correct Answered :
Wrong Answered :
172. Which of the following particles has the smallest mass?
A
Muon
B
Proton
C
Electron
D
Neutron
Electron
Correct Answered :
Wrong Answered :
173. Which of the following vitamins is also known as Riboflavin?
A
Vitamin B1
B
Vitamin B6
C
Vitamin B2
D
Vitamin C
Vitamin B2
Correct Answered :
Wrong Answered :
174. Where was the world`s first oil well drilled?
A
Russia
B
India
C
The United States of America
D
China
The United States of America
Correct Answered :
Wrong Answered :
175. What is the SI unit of the frequency?
A
Metre
B
Second
C
Watt
D
Hertz
Hertz
Correct Answered :
Wrong Answered :
176. Which of the following group of animals get nutrition by feeding only on plants?
A
Detritivores
B
Omnivores
C
Herbivores
D
Carnivores
Herbivores
Correct Answered :
Wrong Answered :
177. Which of the following has maximum wavelength in an electromagnetic spectrum?
A
Infrared Rays
B
Radio Waves
C
Micro Waves
D
Gamma Rays
Radio Waves
Correct Answered :
Wrong Answered :
178. Which type of energy source is wind energy?
A
Non-Renewable
B
Exhaustible
C
Non-Conventional
D
Conventional
Non-Conventional
Correct Answered :
Wrong Answered :
179. Which of the following vitamin deficiencies causes Beriberi?
A
Vitamin B12
B
Vitamin B1
C
Vitamin E
D
Vitamin K
Vitamin B1
Correct Answered :
Wrong Answered :
180. The process of acquiring oxygen from outside the body to break-down the food sources for cellular needs is called ____________.
A
Translocation
B
Transpiration
C
Respiration
D
Photosynthesis
Respiration
Correct Answered :
Wrong Answered :
181. What is the chemical symbol of Lead?
A
Pb
B
Au
C
Fe
D
K
Pb
Correct Answered :
Wrong Answered :
182. Which is the second most abundant gas in earth`s troposphere?
A
Hydrogen
B
Nitrogen
C
Carbon Dioxide
D
Oxygen
Oxygen
Correct Answered :
Wrong Answered :
183. What is the atomicity of Argon?
A
2
B
1
C
8
D
3
1
Correct Answered :
Wrong Answered :
184. The ratio of tensile stress (σ) to the longitudinal strain (ε) is defined as _______.
A
Bulk Modulus
B
Young`s modulus
C
Shear Modulus
D
Poisson Ratio
Young`s modulus
Correct Answered :
Wrong Answered :
185. Which of the following gas laws shows the relationship of pressure and temperature?
A
Avogadro Law
B
Boyle`s Law
C
Gay Lussac`s Law
D
Charles Law
Gay Lussac`s Law
Correct Answered :
Wrong Answered :
186. Which of the following is an example of scalar quantity?
A
Force
B
Speed
C
Momentum
D
Velocity
Speed
Correct Answered :
Wrong Answered :
187. What is the SI unit of the amount of substance?
A
Pascal
B
Ampere
C
Mole
D
Candela
Mole
Correct Answered :
Wrong Answered :
188. Which of the following processes denotes degradation of detritus into simpler inorganic substances by bacterial and fungal enzymes?
A
Leaching
B
Eutrophication
C
Catabolism
D
Biomagnification
Catabolism
Correct Answered :
Wrong Answered :
189. Which of the following devices is used to measure electrical resistance in a circuit?
A
Galvanometer
B
Voltmeter
C
Ammeter
D
Ohmmeter
Ohmmeter
Correct Answered :
Wrong Answered :
190. What is the causative organism for Tuberculosis?
A
Fungus
B
Bacteria
C
Virus
D
Protozoa
191. Aspirin is:
A
Acetylsalicylic acid
B
Benzoyl salicylic acid
C
Chlorobenzoic acid
D
Anthranilic acid
Acetylsalicylic acid
Correct Answered :
Wrong Answered :
192. The loudness of sound varies directly with the vibrating body`s:
A
intensity
B
amplitude
C
pitch
D
quality
amplitude
Correct Answered :
Wrong Answered :
193. Which acid is used in the body to help digestion:
A
Hydrochloric Acid
B
Sulphuric Acid
C
Acetic Acid
D
Boric Acid
Hydrochloric Acid
Correct Answered :
Wrong Answered :
194. A man presses more weight on earth at:
A
Sitting position
B
Standing Position
C
Lying Position
D
None of these
Standing Position
Correct Answered :
Wrong Answered :
195. AIDS virus has:
A
Single-stranded RNA
B
Single-stranded DNA
C
Double-stranded RNA
D
Double-stranded DNA
AIDS is a deadly disease caused by HIV (human immunodeficiency virus). The virus has an envelope of protein coat enclosing the Single stranded RNA genome with reverse transcriptase. The core is surrounded by a protein coat called p24. Outside this protein coat is a layer of another protein called p17.
Correct Answered :
Wrong Answered :
196. Nipah is a zoonotic paramyxovirus; where did it originate:
A
Originated from Rats
B
Originated from Bats
C
Originated from Humans
D
Originated from Lab
Originated from Bats
Correct Answered :
Wrong Answered :
197. Plants absorb most of the water needed by them through their
A
Embryonic zone
B
Zone of elongation
C
Root hairs
D
Growing point
While plants can absorb water through their leaves, it is not a very efficient way for plants to take up water. If water condenses on the leaf during high humidity, such as fog, then plants can take in some of that surface water. The bulk of water uptake by most plants is via the roots.
Correct Answered :
Wrong Answered :
198. Which of the following is a non metal that remains liquid at room temperature:
A
Phosphorous
B
Bromine
C
Chlorine
D
Helium
Mercury exists as liquid at room temperature, but bromine is a non metal which is liquid at room temperature.
Correct Answered :
Wrong Answered :
199. Which is the largest blood vessel in the body?
A
Alveoli
B
Artery
C
Aorta
D
Vein
The largest artery is the aorta, the main high-pressure pipeline connected to the heart`s left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries smaller branches are called arterioles and capillaries.
Correct Answered :
Wrong Answered :
200. Chip bags contain which gas:
A
Oxygen
B
Hydrogen
C
Carbon Dioxide
D
Nitrogen
Chips packets are filled with nitrogen because it is an inert gas, which prevents the oxidation of oils present in chips.
Correct Answered :
Wrong Answered :
201. What other viruses belong to the coronavirus family:
A
SARS and Influenzas
B
SARS and MERS
C
SARS and HIV
D
Zika Virus and SARS
SARS and MERS
Correct Answered :
Wrong Answered :
202. Which of the following is a poor conductor of electricity?
A
Distilled Water
B
Graphite
C
Iron
D
Copper
water being a liquid, its conductivity depends upon is dissociation into ions, but due to the low concentration of H+ and OH− ions, it is considered as a non-electrolyte and is a poor conductor of electricity.
Correct Answered :
Wrong Answered :
203. Pick the male reproductive part of plant.
A
Calyx
B
Sepals
C
Stigma
D
Stamens
The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament. This filament holds the anther in position, making the pollen available for dispersal by wind, insects, or birds.
Correct Answered :
Wrong Answered :
204. What is the melting point of water at sea level?
A
100 Degree F
B
-273.14 Degree F
C
0 Degree F
D
32 Degree F
Pure water transitions between the solid and liquid states at 32°F (0°C) at sea level. This temperature is referred to as the melting point when rising temperatures are causing ice to melt and change state from a solid to a liquid (water).
Correct Answered :
Wrong Answered :
205. Which of the following is an example of water borne communicable disease?
A
Alzheimer
B
Cataract
C
Cholera
D
Diabetes
The pathogenic microorganisms, their toxic exudates, and other contaminants together, cause serious conditions such as cholera, diarrhea, typhoid, amebiasis, hepatitis, gastroenteritis, giardiasis, campylobacteriosis, scabies, and worm infections, to name a few.
Correct Answered :
Wrong Answered :
206. Scurvy (Sailors disease) is caused due to the deficiency of __________.
A
Vitamin - D
B
Vitamin - A
C
Vitamin - C
D
Vitamin - E
Scurvy is caused by a chronic vitamin C deficiency.
Correct Answered :
Wrong Answered :
207. Which of the following is blended with petroleum in India to reduce the cost incurred by petroleum import?
A
Chloramphenicol
B
Ethanol
C
Ammonia
D
Polyvinyl Chloride
Ethanol
Correct Answered :
Wrong Answered :
208. Which of the following petroleum products is used in Ointments?
A
Paraffin wax
B
Kerosene
C
Bitumen
D
Diesel
"Paraffin Wax" is a petroleum product which is used for making ointments.
Correct Answered :
Wrong Answered :
209. What is the rate of change of displacement with respect to time?
A
Impulse
B
Length
C
Velocity
D
Momentum
The rate of change of displacement with respect to time gives instantaneous velocity.
Correct Answered :
Wrong Answered :
210. Which of the following diseases is caused by Flavivirus?
A
Tuberculosis
B
Dengue
C
Leprosy
D
Typhoid
Members of this family belong to a single genus, Flavivirus, and cause widespread morbidity and mortality throughout the world. Some of the mosquitoes-transmitted viruses include: Yellow Fever, Dengue Fever, Japanese encephalitis, West Nile viruses, and Zika virus
Correct Answered :
Wrong Answered :
211. Isotone are species of atoms that have the same number of __________.
A
Neutrons
B
Positrons
C
Protons
D
Electrons
Isotone, any of two or more species of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 are isotones, because the nucleus of this species of chlorine consists of 17 protons and 20 neutrons, whereas the nucleus of this species of potassium contains 19 protons and 20 neutrons.
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Wrong Answered :
212. Indole-3-acetic acid (IAA), a Plant Growth Regulator (PGR) is also called ________.
A
Auxin
B
Gibberellins
C
Ethylene
D
Cytokinins
Indole-3-acetic acid (IAA) is the most common plant hormone of the auxin class and it regulates various aspects of plant growth and development. Thus, the terms “auxin” and “IAA” are occasionally used interchangeably.
Correct Answered :
Wrong Answered :
213. What is the unit of force?
A
Radian
B
Pascal
C
Candela
D
Newton
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.
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Wrong Answered :
214. The phenomenon of splitting of light into its colours is known as _________.
A
Reflection
B
Polarization
C
Dispersion
D
Interference
The separation of visible light into its different colors is known as dispersion.
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Wrong Answered :
215. The number of oscillations or vibrations per second in a wave is called _______.
A
Time Period
B
Amplitude
C
Frequency
D
Wavelength
The number of oscillations per second of a vibrating object is known as its frequency. Time period is the time required to complete one oscillation. Loudness of a sound is proportional to the square of the amplitude of its vibration.
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Wrong Answered :
216. Pick the characteristic feature of plane mirror.
A
Enlarged image
B
Real image
C
Lateral inversion
D
Diminished image
An image formed by a plane mirror has the following characteristics: Virtual and erect. Behind the mirror. The size of the image is equal to the size of the object. Laterally inverted image (image of the left side visible on the right side).
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Wrong Answered :
217. Which of the following fuels has the highest calorific value?
A
Liquified Petroleum Gas
B
Hydrogen
C
Methane
D
Compressed Natural Gas
Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.
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Wrong Answered :
218. What is the household name of Sodium Hydrogen carbonate?
A
Bleaching powder
B
Vinegar
C
Washing soda
D
Baking soda
What is the household name of Sodium Hydrogen carbonate?
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Wrong Answered :
219. What is the exudation of drops of xylem sap on the tips or edges of vascular plant leaves?
A
Adhesion
B
Cohesion
C
Imbibition
D
Guttation
Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses, and a number of fungi. Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface.
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Wrong Answered :
220. Which of the following is an example of communicable disease?
A
Diabetes
B
Measles
C
Osteoarthritis
D
Cancer
Some examples of the communicable disease include HIV, hepatitis A, B and C, measles, salmonella, measles, and blood-borne illnesses. Most common forms of spread include fecal-oral, food, sexual intercourse, insect bites, contact with contaminated fomites, droplets, or skin contact.
Correct Answered :
Wrong Answered :
221. Pick the ultrasonic frequency.
A
25 Hz
B
250 Hz
C
25000 Hz
D
2500 Hz
25000 Hz
Correct Answered :
Wrong Answered :
222. The process of depositing a layer of any desired metal on another material by means of electricity is called _______.
A
Centrifugation
B
Amalgamation
C
Electrostriction
D
Electroplating
The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating.
Correct Answered :
Wrong Answered :
223. When a gas is dispersed in liquid medium, the colloid is called _______.
A
Foam
B
Sol
C
Solid Sol
D
Emulsion
Foam
Correct Answered :
Wrong Answered :
224. Coronavirus belongs to which of the following order of viruses?
A
Nidovirales
B
Piccovirales
C
Ortervirales
D
Picornavirales
Nidovirales is an order of enveloped, positive-strand RNA viruses which infect vertebrates and invertebrates. Host organisms include mammals, birds, reptiles, amphibians, fish, arthropods, molluscs, and helminths. The order includes the families Coronaviridae, Arteriviridae, Roniviridae, and Mesoniviridae.
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225. What is meant by DDT, an environmental pollutant?
A
Dichloro diphenyl tetrachloroacetate
B
Dichloro diphenyl trichloroethane
C
Dichloro diethyl trichloroethane
D
Dichloro dimethyl trichlorine
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride. Originally developed as an insecticide, it became infamous for its environmental impacts. DDT was first synthesized in 1874 by the Austrian chemist Othmar Zeidler.
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Wrong Answered :
226. Water is a ______.
A
Amphipathic hydrocarbon solvent
B
Hydrophobic solvent
C
Non-polar solvent
D
Polar solvent
Correct Answered :
Wrong Answered :
227. Which of the following is a secondary cell?
A
Leclanche cell
B
Zinc-carbon dry cell
C
Lead-acid accumulator
D
Daniel Cell
Aluminium-ion battery. Carbon Battery. Single Carbon Battery. ... Flow battery. Vanadium redox battery. ... Lead–acid battery. Deep cycle battery. ... Glass battery. Lithium-ion battery. Lithium ion lithium cobalt oxide battery (ICR) ... Magnesium-ion battery. Metal–air electrochemical cells. Lithium air battery are examples of secondary cells
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228. Which of the following diseases is caused by the bacterium Yersinia pestis?
A
Chickenpox
B
Plague
C
Rubella
D
Mumps
Plague is a disease that affects humans and other mammals. It is caused by the bacterium, Yersinia pestis. Humans usually get plague after being bitten by a rodent flea that is carrying the plague bacterium or by handling an animal infected with plague.
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Wrong Answered :
229. Which of the following illustrates Newton`s Third Law of Motion?
A
AC Generator
B
Hydrogen spectral series
C
Recoiling force of gun
D
X-Ray
The launching of a rocket,Recoiling force of gun and fielder pulling his hand back while catching a ball illustrates Newton`s third law of motion.
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Wrong Answered :
230. Which is a fat-soluble vitamin?
A
Vitamin B1
B
Vitamin A
C
Vitamin B6
D
Vitamin C
Fat-soluble vitamins are absorbed along with fats in the diet and are stored in the body`s fatty tissue and in the liver. They are found in many plant and animal foods and in dietary supplements. Vitamins A, D, E, and K are fat-soluble.
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Wrong Answered :
231. Which of the following nutritional deficiencies causes the condition Osteoporosis?
A
Protein
B
Carbohydrate
C
Calcium
D
Fat
Osteoporosis is associated with low intake of calcium and other nutrients. Dietary copper deficiency might stimulate bone metabolism and increase in hip fractures. Excess vitamin A intake was also associated with lower bone mineral density and higher risk of hip fractures.
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Wrong Answered :
232. Who proposed an atom model with discrete orbits called energy levels?
A
J.J.Thomson
B
Neil Bohr
C
Antoine Lavoisier
D
Joseph Proust
Bohr Atomic Model. Bohr Atomic Model : In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus.
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Wrong Answered :
233. Pick the organism that reproduces by budding.
A
Yeast
B
Ferns
C
Jackfruit tree
D
Spirogyra
Budding is a type of asexual reproduction, which is most commonly associated in both multicellular and unicellular organisms. Bacteria, yeast, corals, flatworms, Jellyfish and sea anemones are some animal species which reproduce through budding.
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234. Atoms of different elements with different atomic numbers, but same mass number are called _____.
A
Isoclines
B
Isotones
C
Isobars
D
Isotopes
The atoms of different elements having same mass number but different atomic number are known as isobars.
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Wrong Answered :
235. What is the product of mass and velocity of an object?
A
Momentum
B
Impulse
C
Acceleration
D
Centrifugal force
Linear momentum is defined as the product of a system`s mass multiplied by its velocity. In symbols, linear momentum is expressed as p = mv. Momentum is directly proportional to the object`s mass and also its velocity. Thus the greater an object`s mass or the greater its velocity, the greater its momentum.
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236. Which Vitamin is called anti-sterility vitamin?
A
Vitamin – E
B
Vitamin – B12
C
Vitamin – A
D
Vitamin – C
Vitamin E was first discovered by Evans and Bishop in 1922, and it was initially denoted as an “anti-sterility factor X” that was necessary for reproduction . Since then, vitamin E has been well characterized as a powerful lipid-soluble antioxidant through extensive research.
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237. Which is the absolute temperature scale?
A
Celsius
B
Fahrenheit
C
Kelvin
D
All of these
Kelvin
Correct Answered :
Wrong Answered :
238. Which layer protects earth from harmful rays of the Sun?
A
Ionosphere
B
Ozone layer
C
Troposphere
D
Magnetosphere
Ozone layer
Correct Answered :
Wrong Answered :
239. Noise or Noise pollution measured in:
A
Phon
B
Deci
C
Decibel
D
Decimal
Decibel
Correct Answered :
Wrong Answered :
240. AIDS is caused by:
A
Bacteria
B
Fungus
C
Helminth
D
Virus
Virus
Correct Answered :
Wrong Answered :
241. What cause a moving body to resist a change in its state of motion?
A
Displacement
B
Acceleration
C
Inertia
D
Velocity
Inertia
Correct Answered :
Wrong Answered :
242. In vulcanisation, natural rubber is heated with:
A
Carbon
B
Silicon
C
Sulphur
D
Phosphorous
Sulphur
Correct Answered :
Wrong Answered :
243. Which of the following is a protein?
A
Natural rubber
B
Starch
C
Cellulose
D
None of these
Natural rubber
Correct Answered :
Wrong Answered :
244. In an atomic nucleus, neutrons and protons are held together by:
A
Gravitational forces
B
Exchange forces
C
Coulombic forces
D
Magnetic forces
Exchange forces
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Wrong Answered :
245. Who suggested that most of the mass of the atom is located in the nucleus?
A
Thompson
B
Bohr
C
Rutherford
D
Einstein
Rutherford
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Wrong Answered :
246. Atoms are composed of:
A
Electrons and protons
B
Electrons only
C
Protons only
D
Electrons and Nuclei
Electrons and Nuclei
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Wrong Answered :
247. Which of the following is used as a moderator in nuclear reactor?
A
Thorium
B
Graphite
C
Radium
D
Heavy water (D2O)
A moderator is a material used in a nuclear reactor to slow down the neutrons produced from fission. By slowing the neutrons down the probability of a neutron interacting with Uranium-235 nuclei is greatly increased thereby maintaining the chain reaction.
Heavy water (D2O) is used as a moderator in nuclear reactor. It containing significantly more than the natural proportions (one in 6,500) of heavy hydrogen (deuterium, D) atoms to ordinary hydrogen atoms. Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons.
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248. Electric current is measured by:
A
Commutator
B
Anemometer
C
Ammeter
D
Voltmeter
Ammeter
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Wrong Answered :
249. Kilowatt is a unit to measure:
A
Work
B
Power
C
Electricity
D
Current
Power.
Correct Answered :
Wrong Answered :
250. One horse power is equal to:
A
746 watts
B
748 watts
C
756 watts
D
736 watts
746 watts
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Wrong Answered :
251. Kilohertz is a unit which measures:
A
Power used by a current of one ampere
B
Electromagnetic radio wave frequencies
C
Voltage
D
Electric resistance
Electromagnetic radio wave frequencies
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Wrong Answered :
252. One kilometer is equal to how many miles?
A
0.84
B
0.5
C
1.6
D
0.62
0.62
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Wrong Answered :
253. Very small time intervals are accurately measure by:
A
White dwarfs
B
Quartz clocks
C
Atomic clocks
D
Pulsars
Atomic clocks
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Wrong Answered :
254. Light year is a measurement of:
A
Speed of aeroplanes
B
Speed of light
C
Stellar distances
D
Speed of rockets
Stellar distances
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Wrong Answered :
255. Fathom is the unit of:
A
Sound
B
Depth
C
Frequency
D
Distance
Depth
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Wrong Answered :
256. What is the unit for measuring the amplitude of a sound?
A
Decibel
B
Coulomb
C
Hum
D
Cycles
Decibel
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Wrong Answered :
257. Which of the following is an element?
A
Ruby
B
Sapphire
C
Emerald
D
Diamond
Diamond
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Wrong Answered :
258. Which of the following metals remain in liquid for under normal conditions?
A
Radium
B
Zinc
C
Uranium
D
Mercury
Mercury
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Wrong Answered :
259. Water is a good solvent of ionic salts because:
A
It has a high specific heat
B
It has no colour
C
It has a high dipole moment
D
It has a high boiling point
It has a high dipole moment
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Wrong Answered :
260. Which of the following is the lightest metal?
A
Mercury
B
Lithium
C
Lead
D
Silver
Lithium
Correct Answered :
Wrong Answered :
261. Which metal pollutes the air of a big city?
A
Copper
B
Chromium
C
Lead
D
Cadmium
Lead
Correct Answered :
Wrong Answered :
262. Balloons are filled with:
A
Nitrogen
B
Helium
C
Oxygen
D
Argon
Helium
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Wrong Answered :
263. Air is a/an:
A
Compound
B
Element
C
Electrolyte
D
Mixture
Mixture
Correct Answered :
Wrong Answered :
264. LPG consists of mainly:
A
Methane, Ethane and Hexane
B
Ethane, Hexane and Nonane
C
Methane, Hexane and Nonane
D
Methane, Butane and Propane
Methane, Butane and Propane
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Wrong Answered :
265. Diamond is an allotropic form of:
A
Germanium
B
Carbon
C
Silicon
D
Sulphur
Carbon
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Wrong Answered :
266. What is laughing gas?
A
Nitrous Oxide
B
Carbon monoxide
C
Sulphur dioxide
D
Hydrogen peroxide
Nitrous Oxide
Correct Answered :
Wrong Answered :
267. Sodium metal is kept under:
A
Petrol
B
Alcohol
C
Water
D
Kerosene
Kerosene
Correct Answered :
Wrong Answered :
268. Which of the following is in liquid form at room temperature?
A
Lithium
B
Sodium
C
Francium
D
Cerium
The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.
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269. Most soluble in water is:
A
Camphor
B
Sulphur
C
Common salt
D
Sugar
Sugar
Correct Answered :
Wrong Answered :
270. Permanent hardness of water may be removed by the addition of:
A
Sodium Carbonate
B
Alum
C
Potassium Permanganate
D
Lime
Sodium Carbonate
Correct Answered :
Wrong Answered :
271. Potassium nitrate is used in:
A
Medicine
B
Fertilizer
C
Salt
D
Glass
Fertilizer
Correct Answered :
Wrong Answered :
272. Carbon, diamond and graphite are together called:
A
Allotrope
B
Isomers
C
Isomorphs
D
Isotopes
Allotrope
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Wrong Answered :
273. Non stick cooking utensils are coated with:
A
Black paint
B
PVC
C
Teflon
D
Polystyrene
Teflon
Correct Answered :
Wrong Answered :
274. The element common to all acids is:
A
Hydrogen
B
Carbon
C
Sulphur
D
Oxygen
Hydrogen
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Wrong Answered :
275. Heavy water is:
A
Deuterium oxide
B
PH7
C
Rain water
D
Tritium oxide
#
Correct Answered :
Wrong Answered :
276. The group of metals Fe, Co, Ni may best called as:
A
Transition metals
B
Main group metals
C
Alkali metals
D
Rare metals
#
Correct Answered :
Wrong Answered :
277. Among the various allotrope of carbon
A
Coke is the hardest, graphite is the softest
B
Diamond is the hardest, coke is the softest
C
Diamond is the hardest, graphite is the softest
D
Diamond is the hardest, lamp black is the softest
#
Correct Answered :
Wrong Answered :
278. Galvanised iron sheets have a coating of :
A
Lead
B
Chromium
C
Zinc
D
Tin
#
Correct Answered :
Wrong Answered :
279. When an iron nail gets rusted, iron oxide is formed:
A
Without any change in the weight of the nail
B
With decrease in the weight of the nail
C
With increase in the weight of the nail
D
Without any change in colour or weight of the nail
#
Correct Answered :
Wrong Answered :
280. The average salinity of sea water is :
A
3%
B
3.5%
C
2.5%
D
2%
#
Correct Answered :
Wrong Answered :
281. The property of a substance to absorb moisture from the air on exposure is called:
A
Osmosis
B
Deliquescence
C
Efflorescence
D
Desiccation
#
Correct Answered :
Wrong Answered :
282. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
A
Argon
B
Xenon
C
Helium
D
Krypton
#
Correct Answered :
Wrong Answered :
283. Which of the following is used as a lubricant?
A
Graphite
B
Silica
C
Iron Oxide
D
Diamond
Graphite is structurally composed of planes of polycyclic carbon atoms that are hexagonal in orientation. The distance of carbon atoms between planes is longer and therefore the bonding is weaker. Graphite is best suited for lubrication in air. It is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant. This slippery quality also makes graphite a good material for pencil lead because it easily sloughs off onto paper. Graphite is bonded by covalent bond, thus, it is helf by weak intermolecular forces. Since it has weak intermolecular forces, graphite would be slippery and soft enough to act as a lubricant.
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Wrong Answered :
284. Bromine is a :
A
Black Solid
B
Red Liquid
C
Colourless Gas
D
Highly Inflammable Gas
Red Liquid
Correct Answered :
Wrong Answered :
285. Which of the gas is not known as green house gas?
A
Methane
B
Nitrous oxide
C
Carbon dioxide
D
Hydrogen
The list of Green House Gases are as follows: 1) Water vapor 2) Carbon dioxide 3) Methane 4) Nitrous oxide 5) Ozone 6) Chlorofluorocarbons. Hydrogen is not a Green House Gas.
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286. Quartz crystals normally used in quartz clocks etc. is chemically :
A
Silicon Dioxide
B
Germanium Oxide
C
A mixture of Germanium Oxide and Silicon dioxide
D
Sodium Silicate
#
Correct Answered :
Wrong Answered :
287. Washing soda is the common name for
A
Sodium Carbonate
B
Calcium Bicarbonate
C
Sodium Bicarbonate
D
Calcium Carbonate
#
Correct Answered :
Wrong Answered :
288. The gas usually filled in the electric bulb is:
A
Nitrogen
B
Hydrogen
C
Carbon dioxide
D
Oxygen
Incandescent light bulbs are filled with an inert gas like nitrogen, argon, or krypton - so that the filament doesn`t catch fire.
Correct Answered :
Wrong Answered :
289. Which of the following metals forms an amalgam with other metals?
A
Tin
B
Mercury
C
Lead
D
Zinc
#
Correct Answered :
Wrong Answered :
290. Which of the following is used in pencils?
A
Graphite
B
Silicon
C
Charcoal
D
Phosphorous
Graphite
Correct Answered :
Wrong Answered :
291. Chlorophyll is a naturally occurring chelate compound in which central metal is:
A
Copper
B
Magnesium
C
Iron
D
Calcium
One such chelate is chlorophyll, the green pigment of plants. In chlorophyll the central ion is magnesium, and the large organic molecule is a porphyrin. The porphyrin contains four nitrogen atoms that form bonds to magnesium in a square planar arrangement.
Correct Answered :
Wrong Answered :
292. Which of the following is a non metal that remains liquid at room temperature?
A
Phosphorous
B
Bromine
C
Chlorine
D
Helium
Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Its properties are thus intermediate between those of chlorine and iodine.
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Wrong Answered :
293. Brass gets discoloured in air because of the presence of which of the following gases in air?
A
Oxygen
B
Hydrogen Sulphide
C
Carbox dioxide
D
Nitrogen
Hydrogen Sulphide
Correct Answered :
Wrong Answered :
294. Electric bulb filament is made of:
A
Copper
B
Aluminum
C
Lead
D
Tungsten
Tungsten
Correct Answered :
Wrong Answered :
295. The tree sends down roots from its branches to the soil is known as:
A
Oak
B
Pine
C
Banyan
D
Palm
Banyan
Correct Answered :
Wrong Answered :
296. Rigidity of facial muscles , Rictus grin is associated with:
A
Leprosey
B
Tetany
C
Tetanus
D
Actinomycosis
Risus sardonicus or rictus grin is a highly characteristic, abnormal, sustained spasm of the facial muscles that appears to produce grinning. It may be caused by tetanus.
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Wrong Answered :
297. Name of a bacterial disease with oral manifestation is:
A
Measles
B
Chicken Pox
C
Beri Beri
D
Diphtheria
Diphtheria is an infection caused by strains of bacteria called Corynebacterium diphtheriae that make toxin.
Correct Answered :
Wrong Answered :
298. The average adult has a blood volume of about ..........litres?
A
5
B
7
C
6
D
6.5
The average adult has about 1.2 to 1.5 gallons (4.5 to 5.5 liters) of blood circulating inside their body.
Correct Answered :
Wrong Answered :
299. People living in high altitudes (like mountains) usually have a:
A
Smaller number of Red Blood Cells
B
Larger number of Red Blood Cells
C
Smaller number of White Blood Cells
D
Larger number of White Blood Cells
People living in high altitudes (like mountains) usually have a larger number of Red Blood Cells.
Correct Answered :
Wrong Answered :
300. Severe deficiency of Vitamin D results in:
A
Scurvy
B
Rickets
C
Night Blindness
D
Beri Beri
Severe lack of vitamin D causes rickets, which shows up in children as incorrect growth patterns, weakness in muscles, pain in bones and deformities in joints. This is very rare. However, children who are deficient in vitamin D can also have muscle weakness or sore and painful muscles.
Correct Answered :
Wrong Answered :
301. Vitamin B is soluble in:
A
Water
B
Fats
C
Bomb
D
None of these
There are nine water-soluble vitamins: the B vitamins -- folate, thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B6, and vitamin B12 -- and vitamin C. Deficiency of any of these water-soluble vitamins results in a clinical syndrome that may result in severe morbidity and mortality.
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Wrong Answered :
302. Vitamin A is soluble in:
A
Water
B
Fats
C
Both A and B
D
None of these
Vitamin A, also known as retinol, is a fat-soluble vitamin traditionally associated with vision and eye health. The most abundant dietary sources of vitamin A are liver, fish liver oil and butter.
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Wrong Answered :
303. The blister form of copper is the ............form:
A
Impure
B
Raw
C
Pure
D
Refined
Blister copper is partly purified copper with a blistered surface formed during smelting due to the release of gas during cooling.
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304. pH is an abbreviation for:
A
Power of Hydrogen
B
Possibility of Hydrogen
C
Population of Hydrogen
D
Position of Hydrogen
The letters pH stand for potential of hydrogen, since pH is effectively a measure of the concentration of hydrogen ions (that is, protons) in a substance.
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305. The Average human body contains about ..............gram of sodium chloride:
A
190
B
210
C
230
D
250
The human body contains many salts, of which sodium chloride (AKA common table salt) is the major one, making up around 0.4 per cent of the bodys weight at a concentration pretty well equivalent to that in seawater.
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306. The substance which increases the the rate of Chemical reaction is:
A
Metal
B
Catalyst
C
Alloy
D
Enzymes
Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed.
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307. The most abundant element in the Universe is:
A
Hydrogen
B
Oxygen
C
Carbon Dioxide
D
Silicon
Hydrogen is the most abundant element in the universe, accounting for about 75 percent of its normal matter, and was created in the Big Bang. Helium is an element, usually in the form of a gas, that consists of a nucleus of two protons and two neutrons surrounded by two electrons.
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308. All electromagnetic radiations travel through vaccum with the speed:
A
Equal the speed of Light
B
Less than the speed of Light
C
Greater than the speed of Light
D
A or B
Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the "speed of light"; nothing can move faster than the speed of light.
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309. A Transistor is a semiconductor device with at least..........terminals.
A
2
B
3
C
4
D
5
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Transistors are one of the basic building blocks of modern electronics. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.
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310. The S I unit of Heat is:
A
Joule
B
Ohm
C
volt
D
Newton
As an amount of energy (being transferred), the SI unit of heat is the joule (J).
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311. If we add salt to the pure water, its boiling point will
A
Increase
B
Decrease
C
Remain same
D
None of these
If you add salt to water, you raise the waters boiling point, or the temperature at which it will boil. The temperature needed to boil will increase about 0.5 C for every 58 grams of dissolved salt per kilogram of water.
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312. An Instrument used to measure gas pressure is called:
A
Ammeter
B
Barometer
C
Galvanometer
D
Manometer
A manometer is a device that calculates the pressure of a gas or vapour; some are made up of a U-shaped tube with a moving liquid column.
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313. When Vapours of a substance are cooled and changes into liquid, it is called:
A
Conduction
B
Condensation
C
Convection
D
Evaporation
If water vapour (gas) is cooled, it changes to water (liquid). This change is called condensing.
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314. The speed of sound is slowest in:
A
Solids
B
Liquids
C
Gases
D
Vacum
In colloquial speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: typically, sound travels most slowly in gases, faster in liquids, and fastest in solids.
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315. A body weighs 10 kgs on the equator. At the poles, it is likely to weigh
A
10 kgs
B
Less than 10 kgs
C
More than 10 kgs
D
0 kgs
A body weighs more at the poles than at the equator, because the earth is not a perfect square, but it is flattened at the poles. The distance between the equator and the centre of the earth and the poles, therefore the force of gravitation is more at the poles than at the equator, and so it weighs more at the poles than equator.
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316. Which one among the following statements about thermal conductivity is correct?
A
Steel > Wood > Water
B
Steel > Water>Wood
C
Water > Wood >Steel
D
Water > Steel > Wood
Thermal conductivity is defined as the heat flow per unit time. Steel has a higher thermal conductivity than water and wood. [Thermal conductivity of steel = 50.2 w/mk Thermal conductivity of water = 0.6 w/mk Thermal conductivity of wood = 0.12 w/mk]
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317. Which among the following is the hardest part of our body?
A
Skull Bones
B
Thumb Nails
C
Rib Bones
D
Enamel of Teeth
#
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318. Ozone layer is the part of
A
Mesosphere
B
Stratosphere
C
Thermosphere
D
Troposphere
The ozone layer or ozone shield is a region of Earth`s stratosphere that absorbs most of the Sun`s ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.
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319. Which of the following is source of renewable energy?
A
Natural gas
B
Petroleum
C
Wind Energy
D
Nuclear Energy
Wind Energy
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320. Light year is a measure of
A
Time
B
Speed
C
Distance
D
Luminosity
Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
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321. In blood platelets are required for
A
Transporting Oxygen
B
Transporting Carbon dioxide
C
Initiating clotting of blood
D
Immunity
Platelets are tiny blood cells that help your body form clots to stop bleeding. If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site of damage and form a plug (clot) to fix the damage.
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322. Which attribute of sound wave is related to the loudness of sound?
A
Amplitude
B
Frequency
C
Pitch
D
Speed
The amplitude of a sound wave determines it relative loudness. In music, the loudness of a note is called its dynamic level. In physics, we measure the amplitude of sound waves in decibels (dB), which do not correspond with dynamic levels.
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323. Which of the following gases is not responsible for global warming?
A
Water vapours
B
Oxygen
C
Nitrous Oxide
D
Methane
Oxygen
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324. Circulatory system is made of
A
veins and arteries
B
lymph vessels and nodes
C
blood vessels, heart and blood
D
capillaries and veins
Your circulatory system is made up of several parts, including your:
Heart: This muscular organ works to pump blood throughout your body via an intricate network of blood vessels.
Arteries. These thick-walled blood vessels carry oxygenated blood away from your heart.
Veins: These blood vessels carry deoxygenated blood back toward your heart.
Capillaries: These tiny blood vessels facilitate the exchange of oxygen, nutrients, and waste between your circulatory system and your organs and tissues.
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325. Graphite is a good conductor of electricity. It is because
A
Linear structure
B
tetrahedral structure
C
trigonal planer structure
D
hexagonal multilayer structure
Since graphite is a crystalline solid it can be defined by a basic unit cell. Graphite is hexagonal and therefore is defined by a hexagonal unit cell. ... Since each unit cell contains “centered” and “edge” carbon atoms the unit cell is considered a “centered” unit cell as opposed to a primitive unit cell.
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326. After diagnosis of a disease in a person, the doctor advices the patient iron and folic acid tablets
A
Osteoporosis
B
Annemia
C
Goitre
D
Protein Energy Malnutrition
Osteoporosis is a condition in which bones are fragile and are more susceptible to fractures. Anaemia is a condition in which there is a deficiency of red blood cells or haemoglobin in the blood. It may result due to lack of iron or folic acid. Regular dose of iron and folic acid tablets reduces anaemia. Goitre is a condition in which there is swelling in the neck due to enlarged thyroid gland. Protein-energy malnutrition (PEM) is a condition in which there is deficiency of protein and energy resulting in various disorders like marasmus and kwashiorkor.
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327. Altitude sickness is caused at high altitude due to
A
high partial pressure of oxygen
B
low partial pressure of oxygen
C
low level of haemoglobin
D
high partial pressure of carbon dioxide
At higher altitudes, the pressure of the air around you (barometric pressure) decreases so there is less oxygen in surrounding air.
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328. Which one of the following hormones is essential for the uptake of glucose by cells in the human body?
A
GH
B
TSH
C
Insulin
D
Cortisol
Insulin is a hormone created by your pancreas that controls the amount of glucose in your bloodstream at any given moment. It also helps store glucose in your liver, fat, and muscles.
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329. Bernoulli`s principle is based on which one among the following laws?
A
Conservation of mass
B
Conservation of momentum
C
Conservation of angular momentum
D
Conservation of energy
Bernoulli’s principle states that The total mechanical energy of the moving fluid comprising the gravitational potential energy of elevation, the energy associated with the fluid pressure and the kinetic energy of the fluid motion, remains constant.
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330. Biological processes is used to purify water in a waste water treatment plants, this stage is called
A
Primary sewage treatment
B
Secondary sewage treatment
C
Waste water reduction
D
Biochemical reduction
The stage in which the biological processes is used to purify water in a waste-water treatment plants is called secondary sewage treatment
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331. Niacin is the name of
A
Vitamin B2
B
Vitamin B4
C
Vitamin B5
D
Vitamin B3
Niacin, also known as nicotinic acid, is an organic compound and a form of vitamin B3, an essential human nutrient. It can be manufactured by plants and animals from the amino acid tryptophan.
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332. For the removal of gaseous pollutants which of the following devices is suitable?
A
Wet scrubber
B
Cyclone separator
C
Electrostatic precipitator
D
Fabric Filter
Scrubbers are a type of system used to remove harmful materials from industrial exhaust gasses before they are released into the environment. These pollutants are generally gaseous, and when scrubbers are used to specifically remove SOx, they are referred to as flue gas desulfurization.
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333. Which of the following acids is a vitamin C?
A
Aspartic acid
B
Ascorbic acid
C
Adipic acid
D
Saccharic acid
Vitamin C, also known as ascorbic acid and L-ascorbic acid, is a vitamin found in food and used as a dietary supplement
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334. Which of the following is a water soluble vitamin?
A
Vitamin B
B
Vitamin A
C
Vitamin D
D
Vitamin K
The water-soluble vitamins include ascorbic acid (vitamin C), thiamin, riboflavin, niacin, vitamin B6 (pyridoxine, pyridoxal, and pyridoxamine), folacin, vitamin B12, biotin, and pantothenic acid
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335. A hanging balloon blown up with air becomes smaller when the air in a room becomes cooler because the molecules of air
A
Move slower
B
Become bigger
C
Move faster
D
Become smaller
Moves slower
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336. Which of the following helps in preventing floods?
A
Deforestation
B
Tilling the land
C
Afforestation
D
Removing the surface soil of the earth
Afforestation involves the planting of trees in a drainage basin to increase interception and storage while reducing surface runoff. ... When combined with floodplain zoning, afforestation can be very effective at reducing the risk of flooding. Planting trees help prevent erosion because the roots bind the soil.
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337. The process in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash, is known as
A
Contour Cropping
B
Terrace Cropping
C
Crop rotation
D
Intercopping
The method of soil conservation in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash is called Intercropping. In inter cropping the agricultural field is utilised for growing two or more crops in a specific pattern.
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338. Which of the following motions is used in windmill to turn the turbine of the electric generator to generate electricity?
A
Rotatory motion
B
Linear motion
C
Vertical motion
D
Circular motion
A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator.
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339. In a human body the largest endocrine gland is called
A
pineal gland
B
pituitary gland
C
thyroid gland
D
adrenal gland
The thyroid is our body`s biggest endocrine gland, and regulates important metabolic processes connected to our heart rate, body temperature and energy levels.
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340. The pollutant which is responsible for ozone holes is
A
oxygen
B
carbon dioxide
C
sulphur dioxide
D
chlorofluorocarbons
Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
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341. Which of the following enzymes is present in the salivary glands of human beings?
A
Trypsin
B
Amylase
C
Lipase
D
Pepsin
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine.
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342. The source of information for making proteins is generally stored in
A
RNA
B
enzymes
C
DNA
D
rough endoplasmic reticulum
The information to make proteins is stored in an organism`s DNA. Each protein is coded for by a specific section of DNA called a gene. A gene is the section of DNA required to produce one protein.
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343. Plants that have lost their capacity to reproduce seeds, usually reproduce by
A
binary fission
B
multiple fission
C
gametic fission
D
vegatative propagaion
If the plants lose their capacity to produce seed, they will carry out reproduction through asexual means, through their vegetative parts like stem, leaf, branch, etc. The formation of new plants from detached vegetative parts is called vegetative propagation.
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344. Tawa irrigation project is in
A
Madhya Pradesh
B
Orissa
C
Maharashtra
D
Haryana
Tawa Reservoir is a reservoir on the Tawa River in central India. It is located in Itarsi of Hoshangabad District of Madhya Pradesh state, above Betul district.
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345. Plant harmones are also called
A
Phytohormones
B
hypothomes
C
metahormones
D
cytohormones
Plant hormones (also known as phytohormones) are organic substances that regulate plant growth and development.
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346. Food webs are generally known to be
A
irrelevant to food chains
B
having one kind of food
C
independent arrangement of food chains
D
interconnected arrangement of food chains
A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Another name for food web is consumer-resource system.
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347. Normally, what is the average life span of RBC`s?
A
220 Days
B
4 weeks
C
4 days
D
120 days
Human red blood cells are formed mainly in the bone marrow and are believed to have an average life span of approximately 120 days.
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348. Some preserved traces of living organisms usually on the hardened mud found in the deep layers of the earth are usually known as
A
RNA
B
Histones
C
Fossils
D
Chromosomes
The word fossil comes from the Latin word fossus, meaning "having been dug up." Fossils are often found in rock formations deep in the earth. Fossilization is the process of remains becoming fossils.
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349. Hydra is an organism that reproduces asexually by
A
Binary fission
B
Multiple fission
C
vegetative propagation
D
Budding
When food is plentiful, many Hydra reproduce asexually by budding. The buds form from the body wall, grow into miniature adults and break away when mature.
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350. Eggs in carpels are usually known as
A
Ovaries
B
Ovules
C
styles
D
stigma
A carpel is the female reproductive part of the flower —composed of ovary, style, and stigma— and usually interpreted as modified leaves that bear structures called ovules, inside which egg cells ultimately form.
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351. The increase in global temperatures is the result of
A
Good Climate
B
Greenhouse effect
C
Deforestation
D
Ice formation
Global warming is the unusually rapid increase in Earth`s average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels
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352. Pituitary gland, pineal gland and hypothalamus are located in which part of the human body?
A
Kidney
B
Brain
C
Thoracic cavity
D
Neck
The pituitary gland or hypophysis is a small gland about 1 centimeter in diameter or the size of a pea. It is nearly surrounded by bone as it rests in the sella turcica, a depression in the sphenoid bone. The gland is connected to the hypothalamus of the brain by a slender stalk called the infundibulum.
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353. On what cellular structures are genes in eukaryotes carried?
A
Endoplasmic reticulum
B
Nuclear membrane
C
Chromosomes
D
Mitrochondria
#
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354. The xylem vessels in plants are responsible for the transport of
A
Water from roots to the shoot
B
amino acids from roots to the shoot
C
gluten from roots to the shoot
D
carbon dioxide from roots to the shoot
Xylem transports water and nutrients that enter the plant in the root up through the stem and out to all parts of the leaf. Xylem has two types of cells known as tracheids and vessel elements.
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355. Which of the following is a part of the brain that controls thinking
A
Forebrain
B
Midbrain
C
Hindbrain
D
Spinal Cord
By far the largest region of your brain is the forebrain (derived from the developmental prosencephalon), which contains the entire cerebrum and several structures directly nestled within it - the thalamus, hypothalamus, the pineal gland and the limbic system.
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356. The testes that is the male reproductive organ in a human body performs which of the following functions?
A
production of sperms only
B
production of testosterone only
C
production of both sperms and progesterone
D
production of both sperms and testosterone
The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.
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357. The structure which provides nutrition to the developing foetus is
A
Ovary
B
Fallopian Tube
C
Placenta
D
Seminal Vesicle
Extra structure which provides nutrition to the embryo is placenta. Placenta is the lifeline between the mother and the baby.
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358. The chlorophyll in photosynthesis is used for
A
absorbing light
B
splitting water molecules
C
reduction
D
absorbing sound
Chlorophyll`s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules.
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359. What is the role of platelets in a human body?
A
Oxygen transport
B
Carbon Dioxide transport
C
Clotting of blood
D
Giving immunity to the body
Platelets, or thrombocytes, are small, colorless cell fragments in our blood that form clots and stop or prevent bleeding.
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360. Bowman`s capsule and glomerulus together form the
A
uriniferous tubule
B
renal pelvis
C
renal corpuscle
D
renal medulla
The Bowman`s capsule and glomerulus together form the renal corpuscle. Blood enters the glomerulus via the afferent arteriole and exits in the efferent arteriole. The endothelium of the glomerulus contains pores, and lies adjacent to the capsule membrane, which also contains pores called filtration slits.
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361. Propagules are used to raise
A
New Plants
B
New born animals
C
bacteria
D
Fungi
Propagules used to raise growth new plants.
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362. An example of primary air pollutant among the following is
A
Sulphuric Acid
B
Photochemical smog
C
Ozone
D
Carbon Monoxide
Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.
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363. Male harmone is
A
Adrenaline
B
Testosterone
C
Progesterone
D
Oestrogen
The major sex hormone in men is testosterone, which is produced mainly in the testes. The testes are controlled by a small gland in the brain called the pituitary gland, which in turn is controlled by an area of the brain called the hypothalamus. Androgens are crucial for male sexual and reproductive function.
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364. In an ecosystem, energy disposal for transfer from one tropic level to the next is in the form of
A
heat energy
B
mechanical energy
C
chemical energy
D
light energy
The 10% of energy available for transfer from one trophic level to the next in an ecosystem is in the form of chemical energy. The producers capture the energy present in sunlight and convert it into chemical energy which is passed into onto other trophic levels.
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365. Homologous chrosomes which are similar in both the sexes are known as
A
Autosomes
B
Allosomes
C
Sex chromosomes
D
Androsomes
Autosomes are homologous chromosomes i.e. chromosomes which contain the same genes (regions of DNA) in the same order along their chromosomal arms. The chromosomes of the 23rd pair are called allosomes consisting of two X chromosomes in most females, and an X chromosome and a Y chromosome in most males.
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366. The Chipko Andolan was basically started against
A
deforestration
B
development of new breeds of forest plants
C
zoological survey of India
D
conservation of natural resources
In the 1970s, an organized resistance to the destruction of forests spread throughout India and came to be known as the Chipko movement. The name of the movement comes from the word "embrace", as the villagers hugged the trees, and prevented the contractors from felling them.
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367. Which of the following organisms can live without oxygen of air?
A
Amoeba
B
Sheep
C
Leech
D
Yeast
Yeast can respire without oxygen. This type of respiration is known as anaerobic respiration.
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368. The organism which indicates the faecal contamination of water in the river Ganga of India is
A
Mucor sp
B
Coliform bacteria
C
Amoeba
D
Lactobacillus bacteria
E coli is considered to be the species of coliform bacteria that is the best indicator of faecal pollution and possible presence of disease-causing pathogens,” said noted environmental scientist and former BHU professor B D Tripathi.
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369. The structural and functional unit of nervous system is called a
A
Nephron
B
Neuron
C
Axon
D
Medulla
Neurons, or nerve cell, are the main structural and functional units of the nervous system. Every neuron consists of a body (soma) and a number of processes (neurites).
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370. Which of the following helps in promoting stem elongation in a plant?
A
Auxin
B
Oxalic Acid
C
Abscisic Acid
D
Ethylene
Auxin is a plant hormone produced in the stem tip that promotes cell elongation.
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371. Vein through which nutrients of the food molecules travels towards heart is called
A
Iliac Vein
B
Portal Vein
C
Hepatic Vein
D
Lateral Vein
Hepatic veins are blood vessels that return low-oxygen blood from your liver back to the heart. The veins are key players in the supply chain that moves the blood that delivers nutrients and oxygen to every cell in your body. A blockage in one of the hepatic veins may damage your liver.
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372. Speciation is defined as the evolutionary process by which
A
Hybird species are formed
B
New and distinct species are formed
C
shows difference in physical traits
D
evolutionary paths converge
Speciation is an evolutionary process by which a new species comes into being. A species is a group of organisms that can reproduce with one another to produce fertile offspring and is reproductively isolated from other organisms.
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373. The structural and functional unit of ecology is generally known as
A
Ecosystem
B
Environment
C
Inheritance
D
Adaptation
The structural and functional unit of the environment is the ecosystem. The ecosystem consists of biotic and abiotic factors and shows interactions among themselves.
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374. The common tube in human male for urine and sperm is
A
Uterus
B
Urinary Bladder
C
Ureter
D
Urethra
The penis carries sperm out of the body. There are three tubes inside the penis. One is called the urethra. It is hollow and carries urine from the bladder through the penis to the outside.
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375. Which of the following is generally considered as a primary source of water?
A
Pond
B
Rain
C
Lakes
D
Rivers
Rainwater is the primary source of water. It is considered as a pure and fresh form of water.
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376. The resources which are usually found everywhere on the earth are known as
A
Ubiquitous resources
B
Renewable resources
C
Non-renewable resources
D
Human made resources
Those resources which are found everywhere are known as ubiquitous resources. Ubiquitous resources are those natural resources which are available everywhere. Air, water and wind are examples of ubiquitous resources.
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377. In the Kidney of mammals, Loop of Henle can be found in
A
Renal Medulla
B
Renal Cortex
C
Renal Pelvis
D
Renal Hilus
The loop of Henle is a U-shaped or hairpin tube that lies deep in the medulla within a renal pyramid and then loops back towards the cortex. Its primary role is to concentrate the salt in the interstitium.
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378. The Stratosphere layer of the atmoshphere consists of what among the following the provides protection to our life?
A
Nitrogen
B
Hydrogen
C
Argon
D
Ozone
The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet`s surface. Most importantly, it absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light from the sun (and sun lamps) that has several harmful effects.
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379. Who among the following gave the first Theory of Evolution
A
Gregor Mendal
B
Isaac Newton
C
Jean-Baptiste Lamarck
D
Thomas Edision
In the early 19th century Jean-Baptiste Lamarck (1744–1829) proposed his theory of the transmutation of species, the first fully formed theory of evolution.
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380. Which of the following is the correct location of Thyroid gland?
A
Behind the neck
B
In front of the neck below larynx
C
Near oesophagus
D
Behind frontal lobe
The thyroid gland is located at the front of the neck just below the Adam`s apple (larynx). It is butterfly-shaped and consists of two lobes located either side of the windpipe (trachea). A normal thyroid gland is not usually outwardly visible or able to be felt if finger pressure is applied to the neck.
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381. Which of the following is considered as a chemical method of contraception?
A
Grafting
B
Using Diaphragm
C
Birth control pills
D
Menstruation
Birth control pills (BCPs) contain man-made forms of 2 hormones called estrogen and progestin. These hormones are made naturally in a woman`s ovaries. BCPs can contain both of these hormones, or have progestin only. Both hormones prevent a woman`s ovary from releasing an egg during her menstrual cycle (called ovulation).BCPs are also called oral contraceptives or just "the pill."
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382. Chlamydiosis is related with
A
Syphills
B
Gonorrhoea
C
Urethra
D
HIV
It is caused by bacteria called Chlamydia trachomatis. It can infect both men and women. Women can get chlamydia in the cervix, rectum, or throat. Men can get chlamydia in the urethra (inside the penis), rectum, or throat.
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383. In a plant the small pores present on the surface of a leaf are known as
A
Cholorphyll
B
Stomata
C
Guard Cells
D
Leaf Pore
Stomate, also called stoma, plural stomata or stomas, any of the microscopic openings or pores in the epidermis of leaves and young stems.
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384. The gap between two neurons is generally known as
A
Synopsis
B
Impulse
C
Synapse
D
Synaptic Code
Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector).
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385. The fluid medium contained in the blood is
A
Plasma
B
Syrup
C
Platelets
D
Lymph
Plasma, also called blood plasma, the liquid portion of blood. Plasma serves as a transport medium for delivering nutrients to the cells of the various organs of the body and for transporting waste products derived from cellular metabolism to the kidneys, liver, and lungs for excretion.
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386. what is unit of electrical resistance?
A
Mho
B
S
C
Ohm
D
Ampere
The unit of the electrical resistance, measured with direct current, is the ohm (abbreviated Ω), named after the German physicist and mathematician Georg Simon Ohm (1789-1854). According to ohm`s law, the resistance R is the ratio of the voltage U across a conductor and the current I flowing through it: R = U / I.
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387. Isotones is defined as the atoms of different elements containing same number of
A
electrons
B
protons
C
neutrons
D
nucleons
Isotone, any of two or more species of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 are isotones, because the nucleus of this species of chlorine consists of 17 protons and 20 neutrons, whereas the nucleus of this species of potassium contains 19 protons and 20 neutrons
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388. The macronutrient needed for plants is
A
Copper
B
Iron
C
Zinc
D
Potassium
There are 7 essential plant nutrient elements defined as micronutrients boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl).
Macronutrients are essential for plant growth and a good overall state of the plant. The primary macronutrients are Nitrogen (N), Phosphorus (P), and Potassium (K). Nitrogen is essential for plant development, since it plays a fundamental role in energy metabolism and protein synthesis
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389. Which of the following devices converts electrical energy to sound?
A
Loudspeaker
B
Solar Cell
C
Wind Turbine
D
Microphone
Electromechanical transducer, any type of device that either converts an electrical signal into sound waves (as in a loudspeaker) or converts a sound wave into an electrical signal (as in the microphone)
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390. Electric potential difference is known as
A
Current
B
Resistance
C
Conductance
D
Voltage
The unit of the electric potential difference is volt. One volt is defined as the one joule of energy is required to carry one coulomb of charge. Sometimes, the electric potential difference is referred to as voltage. Therefore, electric potential difference is also known as voltage
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391. Which among the following is less polluting fuel with respect to global emissions?
A
Coal
B
Petrol
C
Natural Gas
D
Kerosene
Natural gas is less polluting fuel. Natural gas is the cleanest of all the fossil fuels. The global warming emissions from Natural gas combustion are much lower than those from coal or oil.
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392. The gas which is stable without octet configuration is
A
Argon
B
Helium
C
Radon
D
Neon
Helium has two electrons. Its electronic configuration is 1s2. So it does not have complete octet.
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393. The distance travelled by an object in a specified direction is
A
Displacement
B
Acceleration
C
Velocity
D
Speed
The distance travelled by an object in a specific direction is called displacement. Displacement is a vector quantity. This means that it can be defined only when proper magnitude and direction are mentioned.
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394. A freely falling body under the pull of the Earth has a
A
Random acceleration
B
Infinite acceleration
C
Variable acceleration
D
Uniform acceleration
This gravitational force is due to the uniform acceleration due to gravity which is considered constant near the surface of the earth and is equal to g = 10m / s2. Thus a freely falling body falls with the uniform acceleration and so it has non zero velocity or the velocity keeps on increasing.
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395. The inertia of a body depends on its
A
volume
B
mass
C
area
D
shape
inertia is the nature of the body to resist the change in its state and mass is the amount of matter in the body. Inertia of the body depends on the mass of the body.
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396. The scientist who said that an object in motion will remain in same motion as long as no external force is applied is
A
Newton
B
Dalton
C
Galileo
D
Aristotle
Isaac Newton`s First Law of Motion describes the behavior of a massive body at rest or in uniform linear motion, i.e., not accelerating or rotating. The First Law states, A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.
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397. Which of the following belongs to autotroph?
A
Lion
B
Cow
C
Grass
D
Cat
Algae, along with plants and some bacteria and fungi, are autotrophs. Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis.
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398. Which of the following is a Greenhouse gas?
A
Nitrogen
B
Methane
C
Oxygen
D
Sulphur Dioxide
Carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O) and ozone (O 3 ) are the greenhouse gases present in Earth`s atmosphere.
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399. Which of the following battery is a primary battery?
A
Lead Acid
B
Nickel Metal Hydride
C
Lithium
D
Nickel Cadmium
Lithium
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400. Which of the following law states, matter can neither created nor destroyed during a chemical reaction?
A
Constant proportion
B
Conservation of mass
C
Disproportion
D
Invisible particles
The Law of Conservation of Mass dates from Antoine Lavoisier`s 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.
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401. Electronic configuration of sodium is
A
8,2,1
B
2,1,8
C
2,8,1
D
1,8,2
In this notation, the electronic configuration of sodium would be distributed in the orbitals as 2-8-1.
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402. Which of the following is a renewable resource?
A
Petrol
B
LPG
C
Coal
D
Wind
Wind
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403. If the net force acting on an object is zero, then the body is known to be in the state of
A
motion
B
uniform motion
C
equillibrium
D
inertia motion
Equilibrium
The state of a body at rest or in uniform motion, the resultant of all forces on which is zero.
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404. Methyl orange indicator give which of the following colour in an acid solution
A
Red
B
Yellow
C
Orange
D
Pink
Methyl orange indicator gives red color in acid solution.
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405. Addition of Sodium chloride to water
A
increases temperature of water
B
decreases temperature of water
C
no change in temperature
D
rapidly increases temperature and then decreases
If you add salt to water, you raise the water`s boiling point, or the temperature at which it will boil. The temperature needed to boil will increase about 0.5 C for every 58 grams of dissolved salt per kilogram of water.
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406. Components of the Stainless steel alloy are
A
Iron, Nickel and Chromium
B
Iron, Nickel and Magnesium
C
Iron, Bronze and Magnesium
D
Bronze, Magnesium and Nickel
Stainless steel alloys contain carbon, chromium, nickel, molybdenum, and manganese, phosphorus, sulfur, and silicon as trace elements.
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407. Functional group in butanal is
A
CHO
B
COOH
C
COOR
D
CO
In Butanal, the functional group is −CHO. In Butanol, the functional group is −OH.
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408. Rancidity in oils and fats is due to
A
Oxidation
B
Reduction
C
Substitution reaction
D
Combination reaction
Oxygen is eight times more soluble in fats than in water and it is the oxidation resulting from this exposure that is the primary cause of rancidity. Oxidation primarily occurs with unsaturated fats by a free radical-mediated process.
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409. An example of saturated carbon compound is
A
Ethane
B
Ethene
C
Propene
D
Alkene
Example of saturated carbon compound is Ethane (C2H6).
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410. When carbon dioxide is passed through lime water, the white precipitate obtained is
A
Calcium Carbonate
B
Sodium Carbonate
C
Potassium Carbonate
D
Zinc Carbonate
When carbon dioxide is passed through lime water, it turns milky due to formation of white precipitate in form of calcium carbonate.
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411. When Sodium reacts with water to form sodium hydroxide, the physical state of sodium hydroxide is
A
Solid
B
Liquid
C
Gas
D
Plasma
Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
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412. Most reactive metal among the following is
A
Sodium
B
Magnesium
C
Gold
D
Silver
After Potassium, Sodium is the most reactive metal.
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413. Antacid used for reducing stomach pain is a
A
mild base
B
mild acid
C
neutral solution
D
strong acid
To get rid of stomach pain, people use bases called antacids. These antacids neutralise the excess acid. Magnesium hydroxide (Milk of magnesia), a mild base, is often used for this purpose.
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414. In a homologous series, increase in melting point can be seen with increase in
A
Molecular mass
B
Atomic number
C
Proton
D
Electron
The number of C atoms in homologous series increases gradually. Van der Waal`s force increases as the molecules get bigger. Hence, the melting and boiling points of the members of homologous series increase gradually because their molecular masses increase.
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415. Liberation of heat during chemical reaction is termed as
A
Exothermic reactions
B
Endothermic reactions
C
Isothermic reactions
D
Photochemical reactions
A chemical reaction in which heat or energy is liberated is called an exothermic reaction.
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416. Ozone acts as an air pollutant and becomes harmful to the living organisms when present in which of the following layers of the atmosphere?
A
Ionosphere
B
Troposphere
C
Stratosphere
D
Mesosphere
Ozone in the stratosphere protects life on Earth from harmful ultraviolet (UV) radiation and is therefore often called good ozone. This is in contrast to ozone in the troposphere, the lowest layer of the atmosphere, where it is an air pollutant and can be harmful to humans, animals and vegetation.
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417. Unsaturated carbon compound when burnt gives
A
blue flame
B
green flame
C
yellow flame
D
no flame
Unsaturated carbon compounds on combustion give a yellow flame with lots of black soot. On combustion, saturated carbon compounds give a clean flame while unsaturated carbon compounds give a yellow flame with lots of black soot.
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418. Tooth decay starts when pH of mouth
A
drops below 5
B
rises above 6
C
rises above 8
D
rises above 10
Tooth decay starts when the pH of the mouth is lower than 5.5. Using toothpastes, which are generally basic, for cleaning the teeth can neutralise the excess acid and prevent tooth decay.
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419. Table sugar is the commonly used sweetner in households. The chemical name for this sugar is
A
Sucrose
B
Glucose
C
Dextrose
D
Maltose
Table sugar is made of a type of sugar called sucrose, and is regularly produced from beets or sugar cane. Sucrose is composed of the two simple sugars, glucose and fructose.
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420. Aspirin is prepared by using
A
Salicylic acid
B
Sulphuric Acid
C
Hydrochloric Acid
D
Acetic Acid
Aspirin is prepared by chemical synthesis from salicylic acid, through acetylation with acetic anhydride. The molecular weight of aspirin is 180.16g/mol. It is odourless, colourless to white crystals or crystalline powder.
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421. The formation of patina on copper results in which of the following colours?
A
Magenta
B
White
C
Red
D
Green
The formation of patina on copper is similar to the formation of rust on iron. Both happen when oxygen in the air interacts with the metal atoms in the presence of water. Copper reacts with oxygen that is in the air, resulting in copper dioxide
As copper experiences natural or human-induced corrosive attack, its color changes from the iridescent, golden red normally associated with pure copper to a deep brown and, finally, to hues of blue and green.
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422. Sodium is obtained/isolated from its metal chloride ore by the process of
A
Electrolysis
B
Hydrolysis
C
Carboxylation
D
Decarboxylation
Sodium is extracted from it`s ore by electrolysis of fused sodium chloride. The process is usually carried out ia a special electrochemical cell called the downs cell.
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423. When magnesium ribbon is burnt in presence of air, it forms
A
White flame
B
red flame
C
green flame
D
blue flame
When magnesium ribbon is burnt in the air, it combines with oxygen to form white powder magnesium oxide MgO with the release of heat and light. It forms a white powder of magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product.
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424. pH of the human blood lies in the range of
A
7.35 to 7.45
B
7.52 to 7.72
C
6.21 to 6.61
D
7.00 to 7.21
Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually the body maintains the pH of blood close to 7.40. A doctor evaluates a person`s acid-base balance by measuring the pH and levels of carbon dioxide (an acid) and bicarbonate (a base) in the blood.
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425. Ethanoic acid is also called as
A
Acetic Acid
B
Ethanol
C
Methanol
D
Glycol
Image result for Ethanoic acid is also called as Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids.
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426. The element which exhibits catenation property is
A
Sodium
B
Magnesium
C
Carbon
D
Nitrogen
Carbon exhibits the property of catenation due to strong C-C bond.
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427. Cell phones (including smartphones) give off a form of energy known as
A
Gamma rays
B
X-rays
C
Radio frequency waves
D
microwaves
Cell phones give off a form of energy known as radiofrequency (RF) waves
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428. When rose petal is dipped in a jar of sulphur dioxide
A
the petal gets discolourised
B
the colour of petal increases
C
there is no change in petal colour
D
the petal becomes a liquid
Sulphur dioxide is a good reducing agent, hence it can easily decolourise substances in the presence of water. Therefore, when rose petals are placed in a jar containing sulphur dioxide, they get decolourised.
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429. Which among the following is poor conductor of heat?
A
Gold
B
Silver
C
Copper
D
Glass
Relative to metals, glass is a poor conductor of heat. It is a better heat conductor than some other common building materials, such as wood.
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430. Vinegar contains
A
Acetic Acid
B
Hydrochloric acid
C
Citric acid
D
Phosphoric acid
Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings. Vinegar typically contains 5–8% acetic acid by volume.
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431. Which of the following plants belongs to the grass family?
A
Bamboo
B
Alicia
C
Aloe Vera
D
Hibiscus
The genera in the family of Poaceae include a wide range of grasses, such as bamboo, barley, cane, fescue, lawn grass, oats, pappus, and rice.
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432. Anhydroud calcium chloride is a
A
drying agent
B
hydrating agent
C
carboxylating agent
D
decarboxylating agent
The anhydrous calcium chloride will absorb any water (including condensation, vapour etc) in its environment. It effectively traps that water by changing its molecular make-up.
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433. Esters are formed by reaction of
A
Alcohol and acid
B
acid and base
C
ketone and alcohol
D
alcohol and aldehyde
Esters are formed by the condensation reaction between an alcohol and a carboxylic acid. This is known as esterification.
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434. The loudness of sound is measured in units called
A
Hertz
B
ohms
C
Decibels
D
Moles
We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer.
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435. Which radiation of sunlight is used in heating of a solar cooker?
A
Ultraviolet rays
B
Infrared rays
C
Microwaves
D
Gamma rays
Visible light rays cannot produce enough heat to cook food. So we can say that the infrared rays are the main reason for the working of a solar cooker, it provides a good amount of energy/heat to cook food using a solar cooker.
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436. Which of the following is a secondary fuel?
A
Coal
B
Crude Oil
C
Natural Gas
D
Gasoline
Image result for gasoline is a secondary fuel Secondary fuels are fuels that are derived from some primary fuel or fuels through chemical or physical processes. These are fuels that are not found as a natural resource. Gasoline is the best example of a secondary fuel, as it must be made from oil through distillation processes.
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437. For nearby objects, eye lens is contracted and squeezed into a more convex shape by
A
Sclera
B
fovea
C
Ciliary muscles
D
pupil
So for nearby objects, the ciliary muscles contract and squeeze the lens into a more convex shape. This increase in the curvature of the lens corresponds to a shorter focal length.
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438. The normal loss of near focusing ability that occurs with age is known as
A
Myopia
B
Presbyopia
C
Hypermetropia
D
Astigmatism
Presbyopia is the gradual loss of your eyes ability to focus on nearby objects. It`s a natural, often annoying part of aging.
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439. The near point of a hypermetropic eye is 1m. The power of the lens required to correct this defect is
A
1D
B
2D
C
3D
D
4D
In the problem, it is given that the near point of defective eye is 1 m and that of a normal eye is 25 cm. Hence u=−25 cm. The lens used forms its virtual image at near point of hypermetropic eye i.e., v=−1m=−100 cm. Using lens formula, we have :- v1−u1=f1−1001−−251=f1f=3100=0.33mpower=f(inmetres)1=+3.0D
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440. The phenomenon of splitting of white light into different colours is called
A
scattering
B
dispersion
C
reflection
D
deviation
Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.
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441. The negative magnitude of magnification indicates that the image is
A
Virtual and erect
B
real and errect
C
real and inverted
D
virtual and inverted
A negative magnification indicates that the image is inverted. If the object is placed closer to a converging lens than the focal length, the rays on the far side of the lens diverge. ... The virtual image is upright and the magnification is positive in this case.
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442. An enclosure that sits atop the wind turbine and contains the gear box, low speed shaft and high-speed shaft, generator, controller, and brake is called
A
Rotor
B
Nacelle
C
Generator
D
Controller
The nacelle sits atop the tower and contains the gearbox, low- and high-speed shafts, generator, and brake
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443. Biogas is a type of biofuel that is naturally produced from the decomposition of organic waste. Its main constituents are:
A
Oxygen and Nitrogen
B
Methane and Carbon Dioxide
C
Argon and Helium
D
Hydrogen and Xenon
Biogas is the mixture of gases produced by organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste.
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444. A light ray will retrace its path after reflection for a spherical mirror when it passes through
A
focus
B
vertex
C
centre of curvature
D
pole
If a ray is incident normally on a point on the spherical reflecting surface, the angle of incidence, i=0. So, the angle of refraction, r=0. Therefore, the ray retraces its own path after reflection. And such a ray travels through the centre of curvature of the mirror.
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445. Which one of the following is responsible for diseases such as Cholera, Typhoid and Jaundice?
A
Heat
B
Air Pollution
C
Water Pollution
D
Food Items
446. Little leaf is caused due to the deficiency of
A
Boron
B
Copper
C
Zinc
D
Phosphorus
Little leaf and white bud diseases are caused by a zinc deficiency.
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447. The most common material used in making solar cells is
A
Silver
B
Iron
C
Aluminum
D
Silicon
Silicon is, by far, the most common semiconductor material used in solar cells, representing approximately 95% of the modules sold today. It is also the second most abundant material on Earth (after oxygen) and the most common semiconductor used in computer chips.
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448. Which one of the following physical quantities of an object is specified by its speed and direction?
A
Time
B
Acceleration
C
Mass
D
Velocity
(a) Displacement is a vector quantity, whereas distance is a scalar quantity.
(b) The physical quantity that includes both the speed and direction of the motion of a body is called its velocity
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449. Calcium deficiency in the body occurs in the absence of
A
Vitamin C
B
Vitamin D
C
Vitamin B
D
Vitamin K
Vitamin D is essential for the absorption of calcium in the body. If a person has a deficiency of vitamin D calcium is not absorbed in the body in adequate quantity. Hence, calcium deficiency in the body occurs in the absence of Vitamin D.
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450. Most of the energy produced during respiration is stored in
A
Pyruvic acid
B
Carbon dioxide
C
Adenosine triphosphate
D
Adenosine monophosphate
During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. The energy released during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate).
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451. If the current in a circuit equals 0 A, it is likely that the
A
Resistance is too low
B
Voltage is too high
C
Circuit is open
D
Circuit is closed
Circuit is open
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452. The processes of adding sulphur to rubber is called
A
Pulverisation
B
Vulcanisation
C
Sulphurisation
D
Stablisation
Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.
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453. In a biotic community, the primary consumers are
A
Carnivores
B
Detritivores
C
Herbivores
D
Omnivores
In a biotic community, the primary consumers or first-order consumers are herbivores, they feed on producers. They are also called key industry animals because they convert plant material into animal material, e.g. rat, deer, rabbit, cattle, goat, sheep, insects etc.
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454. Choose the INCORRECT statement from the following
A
The main constituent of bio gas is ethane
B
Gobber gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen.
C
Bio mass is a renewable source of energy
D
Planting more trees is encouraged to ensure clean environment
#
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455. Ozone layer which absorbs harmful solar UV radiation is found in which layer of the atmosphere?
A
Troposphere
B
Stratosphere
C
Mesosphere
D
Ionosphere
The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet`s surface. Most importantly, it absorbs the portion of UV light called UVB.
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456. The energy that is harnessed from the volcanic regions under the earth`s surface and is used to generate power and heat is known as
A
Wave Energy
B
Windmill Energy
C
Spring Energy
D
Geo Thermal Energy
Geothermal energy is a clean, renewable resource that can be harnessed for use as heat and electricity. Geothermal energy is heat that is generated within the Earth. (Geo means “earth,” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use.
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457. India being a tropical country, gets abundance of sunlight. Of late, solar cells have become popular in the country even in its remotest locations. These cells are also called
A
Photovoltaic cells
B
Dry cells
C
Galvanic cells
D
Electromagnetic cells
Photovoltaic cells
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458. Which of the following is a disease that results in inflammation of the skin and also known as eczema?
A
Dermatitis
B
Dysmenorrhea
C
Scabies
D
Constipation
Dermatitis (also known as eczema) is inflammation of the skin, typically characterized by itchiness, redness and a rash.
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459. Scurvy is caused by the deficiency of
A
Vitamin A
B
Vitamin C
C
Vitamin B6
D
Vitamin E
Scurvy is caused by not having enough vitamin C in your diet for at least 3 months. Vitamin C is mainly found in fruit and vegetables. Even people who do not eat very healthily all the time are not usually considered at risk of scurvy.
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460. Which of the following energy sources cannot be replenished in a short period of time?
A
Natural gas
B
Hydro energy
C
Geo thermal energy
D
Wind energy
Natural Gas resources cannot be replenished in a short period of time. It comes under the category of non renewable resources. Natural resources like fossils fuels ( coal, petroleum, natural gas etc.) cannot be reused
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461. What is the unit of measurement for the total amount of ozone in the atmosphere above a point on the earth`surface
A
Dobson Unit
B
Darson Unit
C
Datsun Unit
D
Dalton Unit
The Dobson Unit is the most common unit for measuring ozone concentration.
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462. Which of the following is NOT a noble gas?
A
Helium
B
Nitrogen
C
Argon
D
Neon
Noble gas means any of the gaseous elements which occupy Group 0(18) of the periodic table. They exhibit great stability and very low reaction rate. Complete step by step solution: Noble gases are generally inert gas that exhibit great stability and have generally full filled electronic configuration. They belong to group 18 of the periodic table. Group 18 of the periodic table includes He, Ne, Ar, Kr, Xe and Rn.
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463. Identify the branch of science that explores the chemical processes within and related to living organisms
A
Biochemistry
B
Biotechnology
C
Bioavailability
D
Biophysics
Biochemistry is the branch of science that explores the chemical processes within and related to living organisms. It is a laboratory based science that brings together biology and chemistry. By using chemical knowledge and techniques, biochemists can understand and solve biological problems.
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464. Which of the following is a modified stem that performs the function of photosynthesis?
A
Tendriis
B
Thorns
C
Cladodes
D
Bulbils
Phylloclades are the modified flattened branch. It belongs to genus conifer and is seen in xerophytic plants. It helps in removal of excess water, ascent of sap, cooling effect etc., e.g., opuntia, euphorbia etc. Cladodes perform photosynthesis.
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465. Identify the metals which can be extracted by cyanide process
A
Silver
B
Mercury
C
Copper
D
Zinc
Cyanide process, also called Macarthur-forrest Process, method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide.
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466. What is the frequency of beat, if the pulse rate of a man is 120 beats in one minute?
A
120 Hz
B
2 Hz
C
12 Hz
D
60 Hz
Frequency is nothing but beats / second thus the answer will be 120/60 = 2 Hz
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467. The wheel of toy car rotates about axis and slows down from 200 rps to 10 rps in 2s. What is tis angular retardation?
A
100π
B
200π
C
400π
D
300π
100π
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468. A radioactive element has a half-life period of 800 years. After 2400 years, what amount of the radioactive element will remain?
A
1/8
B
1/9
C
1/2
D
1/3
1/9
Number of half lives,
n = t/T = 2400/800 = 3
N/No = (1/2)3=1/8
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469. What will be the velocity after 6 seconds, if a 0.2kg object at rest is subjected to a force (0.3i - 0.4j)N?)
A
10i - 12j
B
9i - 12j
C
12i - 9j
D
12i - 10j
9i - 12j
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470. What is the ratio of ionization energy of bohr`s hydrogen atom and hydrogen like lithium atom?
A
1/6
B
1/9
C
1/8
D
1/5
1/9
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471. The elastic energy stored per unit volume of the material, when its young`s modulus Y is subjected to stress S is
A
SY/4
B
SY/2
C
S2/2Y
D
2S/Y
Given,
Young`s modulus =Y,
Streaching stress=S,
Energy stored per unit volume is, = 1/2 x stress x strian
We know that, stress = strain x Y
Therefore energy per unit volume will be E = 1/2 x S x S/Y = S2 / 2Y
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472. What is the angle through which cyclist should bend to avoid skidding during a turn?
A
cos-1(v2 / rg)
B
tan-1(v2 / rg)
C
tan-1(v2 / 2rg)
D
cos-1(v2 / rg)1/2
The angle through which a cyclist has to bend himself, to prevent overturning himself is given by tan-1(v2 / rg) Where v is its linear velocity, R is the radius of the turn and g is the acceleration due to gravity.
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473. Susceptibility of a diamagnetic substance is
A
zero
B
small but positive
C
small and negative
D
very large
small and negative
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474. The dimensional formula for modulus of rigidity is
A
M-1L-2T4
B
M2L-2T2
C
M-1L-1T3
D
M1L-1T-2
Modulus of rigidity is the ratio of shear stress to the shear strain.
η = strain / stress
Strain is dimensionless, where as Stress has the dimensions of Pressure.
Stress = F / a Stress = MLT-2 / L2 Stess = ML-1T-2
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475. 1 Fermi is equal to
A
10-15 cm
B
10-15 m
C
10-12 m
D
10-10 m
Fermi, sometimes also referred to as Femtometer, is a unit of length in the SI unit. One Fermi is a very small length. It is equal to 10-15 of a meter. Being such a small unit of length, Fermi is used in the measure of really small distances in nuclear science.
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476. The Ozone gas found in which of the following layers of the atmosphere absorbs harmful UV radiations and prevents them from reaching the earth`s surface?
A
Troposphere
B
Stratosphere
C
Mesosphere
D
Thermosphere
Most ozone (about 90%) is found in the stratosphere, which begins at about 10–16 kilometres above Earth`s surface and extends to an altitude of about 50 kilometres. Ozone in the stratosphere protects life on Earth from harmful ultraviolet (UV) radiation and is therefore often called good ozone.
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477. Which of the following characteristic(s) of a sound wave determine the loudness of the sound?
i) Frequency
ii) Amplitude
iii) Timbre
A
only i and ii
B
only iii
C
only ii
D
only i and iii
The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound
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478. Which of the following options is matched INCORRECTLY?
A
Fuel cell - Chemical energy is converted into Electrical energy
B
Loud Speaker - Sound energy is converted into Electrical energy
C
Photovoltaic cell - Light energy is converted into Electrical energy
D
Electric motor - Electrical energy is converted into Mechanical Energy
Loud speaker - electric energy is converted into sound energy
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479. The act of transferring pollen grains from the male anther of a flower to the female stigma is called
A
Photosynthesis
B
Polarization
C
Pollination
D
Polymerisation
Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma.
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480. Identify the INCORRECT match between the element and its corresponding chemical symbol
A
Calcium - Ca
B
Aluminium - Al
C
Sodium - So
D
Chlorine - Cl
Sodium - Na
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481. Water pollution occurs when harmful substances like microorganisms contaminate a water body degrading the water quality and rendering it toxic to humans or the environment. Which of the following diseases in NOT due to contamination of water?
A
Malaria
B
Tuberculosis
C
Cholera
D
Typhoid
Contaminated water and poor sanitation are linked to transmission of diseases such as cholera, diarrhoea, dysentery, hepatitis A, typhoid, and polio.
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482. The most commonly used bleaching agent for disinfecting drinking water supply is
A
Phenyl
B
Chlorine
C
Alcohol
D
Distilled Water
Chlorine is the most widely used primary disinfectant and is also often used to provide residual disinfection in the distribution system
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483. Vitamins are substances that our body needs to grow and develop normally. The vitamin prepared in our body with the help of sunlight is
A
Vitamin D
B
Vitamin A
C
Vitamin K
D
Vitamin E
vitamin D is the vitamin you need for strong bones! It`s also great for forming strong teeth. Vitamin D even lends a hand to an important mineral — it helps your body absorb the amount of calcium it needs. Vitamin D is made in the skin when exposed to sunlight, or you can get it from the foods you eat.
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484. Which of the following statements is FALSE with reference to the digestive system processes in human beings?
A
Digestion is the breakdown of food into simpler form
B
Ingestion is the intake of food through the mouth
C
Egestion is the removal of digested food from the body
D
Absorption is the release of nutrients from food into the blood stream
#
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485. In which of the following options is the chemical compound and tis common name INCORRECTLY matched?
A
Sodium Bicarbonate ----> Baking Soda
B
Nitrous Oxide ----> Laughing Gas
C
Calcium Carbonate ----> Limestone
D
Sodium Hydroxide ----> Washing Soda
Sodium Hydroxide is commonly known as Caustic Soda
Its Chemical formula is NaOH
It is used for manufacturing of soaps and detergents
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486. German Silver is an alloy of which of the following metals?
A
Aluminium and Tin
B
Copper and Silver
C
Iron , Silver and Tin
D
Copper, Zinc and Nickel
German Silver is an alloy of copper, zinc and nickel, sometimes also containing lead and tin. It was originally named for its silver white colour, but the term silver is now prohibited for alloys not containing that metal
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487. Vitamins are substances that our body needs to grow and develop normally. The deficiency of vitamin K leads to
A
Excessive bleeding due to injury
B
Poor Vision
C
Swollen feet or legs
D
Retarded Growth
There are several vitamin K-dependent proteins involved in coagulation, bone development, and cardiovascular health. Vitamin K deficiency can contribute to significant bleeding, poor bone development, osteoporosis, and increased cardiovascular disease.
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488. Which of the following options is used as disinfectant to disinfect the Personal Protective Equipments (PPE) used by sanitation workers?
A
Sodium Hypochlorite
B
Calcium Carbonate
C
Sodium Benzoate
D
Sodium Bicarbonate
Sodium hypochlorite, commonly known as bleach, is most frequently used as a disinfecting agent. It is a broad-spectrum disinfectant that is effective for the disinfection of viruses, bacteria, fungi, and mycobacterium.
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489. The heat received by a person sitting in front of a fire is due to which of the following mode(s) of heat of transfer?
i) Conduction
ii) Convection
iii) Radiation
A
only i and iii
B
ii only
C
iii only
D
only i and ii
Radiation refers to the emission of energy in rays or waves. Heat moves through space as energy waves. It is the type of heat one feels when sitting in front of a fireplace or around a campfire. It travels in straight lines at the speed of light.
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490. Match the following names of the electro magnetic waves given in list-i with the technological applications given in list-ii
Radio Waves ---- Sterilize Medical Equipment
Gamma Rays ---- Navigation and Air Traffic Control
X-Rays ---- Airpost Scanner
A
a-1 b-2 c-3
B
a-3 b-1 c-2
C
a-2 b-1 c-3
D
a-2 b-3 c-1
Radio waves ----> Navigation and Air Traffic Control
Gamma Rays ----> Sterilize Medical Equipment
X-Rays ----> Airpost Scanner
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491. Identify the versatile organ from the facts given below :
i) It is the largest organ in human body.
ii) It is sensor packed with nerves for keeping the brain in touch with the outside world.
iii) It manufactures vitamin D for converting calcium into healthy bones.
iv) It the body`s largest waste removal system
A
The Skin
B
The Liver
C
The Intestine
D
The Heart
Skin
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492. What is the pH of blood?
A
7.4
B
2.4
C
11
D
14
Acidity and alkalinity are expressed on the pH scale, which ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, with a normal pH range of 7.35 to 7.45. Usually the body maintains the pH of blood close to 7.40.
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493. The basic functional unit of the Kidney is
A
Pyramid
B
Henley`s loop
C
Nephron
D
Nephridia
Together, the renal cortex and renal pyramids constitute the functional portion or of the kidney. Within the parenchyma are about 1 million microscopic structures called , which are the functional units of the kidney. The number of nephrons is constant from birth, and injured or diseased nephrons cannot be replaced.
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494. Cryogenics is
A
a type of tank
B
study of materials and phenomena at low temperature
C
study of radioactive elements
D
none of the above
Cryogenics is the science that addresses the production and effects of very low temperatures. The word originates from the Greek words kryos meaning "frost" and genic meaning "to produce."
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495. The phytochemical smog is formed by
A
Nitrous ozonides
B
Hydrocarbons
C
Nitrogen peroxides and hydrocarbons
D
Solar radiations upon nitrogen oxides and hydrocarbons
Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight
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496. Which green house gas other than methane is produced by agricultural fields?
A
Nitrous oxide
B
Sulphur Dioxide
C
Ammonia
D
Arsenic
Nitrous oxide is a powerful greenhouse gas produced by soil cultivation practices, especially the use of commercial organic fertilizers (including manure), biomass burning etc, This is done by a process of nitrification which converts the nitrogen in fertilizer to the production of nitrous oxide. The excessive use of the fertilizers thereby results in an increase in the nitrous oxide production.
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497. Deficiency of Vitamin A in children causes
A
Goitre
B
Poor Cognitive Development
C
Poor bone growth
D
Increased risk of mortality
Vitamin A deficiency is the leading cause of preventable blindness in children and increases the risk of disease and death from severe infections such as diarrhoeal disease and measles. Vitamin A deficiency may also occur in women during the last trimester of pregnancy in high-risk areas.
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498. Which vitamin is a major lipid soluble antioxidant in cell membranes?
A
Vitamin A
B
Vitamin D
C
Vitamin E
D
Vitamin K
Vitamin E is the major lipid-soluble antioxidant in the cell antioxidant system and is exclusively obtained from the diet. Vitamin E protects polyunsaturated fatty acids and other components of cell membranes and low-density lipoproteins from oxidation by free radicals
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499. Loss of water from tip of leaves is
A
Transpiration
B
Guttation
C
Bleeding
D
Respiration
Guttation is the process of exudation of water droplets from the tips of leaves in vascular plants through special pores called hydathodes. Therefore, the loss of water from the tips of leaves is called guttation.
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500. Which of the following is non essential element in plants?
A
Iron
B
Boron
C
Sulphur
D
Cadmium
An element is said to be essential for plants if plants cannot complete their life cycle without that element, and this element directly involved in some many functions of plants
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501. Which is a not colligative property?
A
Surface tension
B
Osmotic pressure
C
Viscosity
D
Refractive index
Colligative properties of solutions are properties that depend upon the concentration of solute molecules or ions, but not upon the identity of the solute. Colligative properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
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502. The atomic number of sodium is 11 and its mass number is 23. It has
A
11 neutrons and 12 protons
B
12 protons and 11 electrons
C
11 electrons and 12 neutrons
D
12 electrons and 11 neutrons
The atomic number of sodium is 11 that means the number of protons in sodium is 11 and also the number of electrons in sodium is 11 . And the mass number of sodium is 23 that means the total number of protons and neutrons in sodium is 23 . That is, the number of neutrons in the sodium is 12 .
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503. When a hydrogen atom is raised from ground state to excited state
A
Potential energy decreases, kinetic energy increases
B
Potential energy increases, kinetic energy decreases
C
Both potential energy and kinetic energy decreases
D
Absorption spectrum
when a hydrogen atom is raised from ground state to excited state, its potential energy increases whereas kinetic energy decreases.
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504. Which of the following series of lines in the atomic structure of hydrogen atom appear in the visible region?
A
Lyman
B
Paschen
C
Brackett
D
Balmer
Lyman series of hydrogen atom lies in ultraviolet region, Balmer series lies in visible region while Pfund and Paschen series lie in infrared region.
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505. For inelastic collision between two spherical rigid bodies :
A
the total kinetic energy is conserved
B
the total potential energy is conserved
C
the total linear momentum is not conserved
D
the total linear momentum is conserved
In any type of collision, linear momentum is conserved, unless external force acts on the system. elasticity determines the loss in KE. elastic => no loss. inelastic => max. loss of KE
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506. A wave travels through a medium because
A
the medium`s particles are carried along with the wave
B
the wave`s energy passes from particle to particle
C
the medium transfers electromagnetic energy
D
the wave increases the potential two spherical energy
A wave is an propagation of energy along a medium. Waves need a medium in order for them to travel from one point or another. A wave is a particulate transfer of motion from one point to another. A very good example of the need of a medium is regarding sound. Sound cannot travel through a vacuum. This is because there are no air molecules to transfer the energy of the sound propagation. Hence no sound travels through the vacuum. The particle to particle interaction and vibration results in the transfer of energy in a wave propagation.
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507. Physical independence of forces is a consequence of
A
1st law of motion
B
2nd law of motion
C
3rd law of motion
D
all of the above
Physical independence of forces is a consequence of
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508. Solar cells are simple photovoltaic devices that convert solar energy into electricity and are manufactured from the second most abundant element in the earth`s crust. Name It
A
Bauxite
B
Silicon
C
Calcium
D
Aluminium
Solar cells are made up of simple voltaic cell that enables conversion of solar energy into electrical energy directly and is made from the second highest element found in earth`s crust. The material that used in solar cells is Silicon
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509. Which of following vitamin B reduces the risk of spina bifida in unborn babies?
A
Niacin
B
Pantothenic acid
C
Folic acid
D
Riboflavin
Vitamin B-9: Folic acid Your folic acid needs will increase when you become pregnant. Vitamin B-9 can help to reduce your baby`s risk for developing birth defects, including spina bifida and other neural tube defects. Vitamin B is also essential to produce red blood cells.
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510. Which of the following is an example of secondary cell?
A
Lead storage cell
B
Leclanche dry cell
C
Daniell cell
D
Hydrogen cell
A secondary cell is a rechargeable battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary cell, which is supplied fully charged and discarded after use. The chemical reaction in a secondary cell is reversible and it has low internal resistance. It can supply both low current and high current.
Example: Li-H Battery, Nickel-cadmium (NiCd) battery, lead storage battery
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511. The chemical name of which of the following vitamins is Ergocalciferol?
A
Vitamin A
B
Vitamin B6
C
Vitamin D2
D
Vitamin K
The chemical name of vitamin D2 is Ergocalciferol
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512. Which of the following forms of energy drives a wind turbine, a device use to generate electricity?
A
Gravitational Potential Energy
B
Mechanical Energy
C
Kinetic Energy
D
Hydrothermal Energy
Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity.
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513. Water helps control our body temperature and allows us to adapt to changes in environmental temperatures because it has
A
High heat capacity
B
Low heat capacity
C
High entropy
D
Low entropy
Water has a relatively high heat capacity, meaning it can absorb a lot of heat before its temperature rises. This trait allows the water in every cell of the human body to act as a buffer against sudden temperature changes. Blood, which is made largely of water, moves heat away from the extremities and toward the vital organs when it needs to conserve heat, it flows towards the skin surface to release excess heat when necessary, and it transports muscle heat away as needed. Water also helps expel excess heat from the body as water vapor from the lungs and sweat on the skin.
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514. When a fan is switched off, it continues to rotate for some time before coming to rest. This is due to
A
Force of acceleration
B
Inertia of motion
C
Inertia of rest
D
Inertia of direction
Newton`s first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.
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515. Mercury : Minamata disease :: ? : Itai-Itai disease
A
Lead
B
Nickel
C
Iron
D
Cadmium
Itai-itai disease is caused by cadmium (Cd) exposure, produced as a result of human activities related to industrialisation
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516. Which of the following statements is INCORRECT with reference to advantages of tidal energy?
A
Tidal power is a green energy source as it does not emit greenhouse gases
B
Tidal currents are highly unpredictable and inconsistent
C
Electricity can be generated from tides much more efficiently at slower speeds
D
Construction cost of tidal power plants is high but maintenance costs are ralitvely low
Benefit of tidal power is that it is predictable. The gravitational forces of celestial bodies are not going to stop anytime soon. Furthermore, as high and low tide is cyclical, it is far easier for engineers to design efficient systems, than say, predicting when the wind will blow or when the sun will shine.
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517. Which of the following processes helps in transportation of minerals from soil to al the parts of the plants?
A
Respiration
B
Imbibiton
C
Transpiration
D
Translocation
Transpiration helps to transport minerals from the soil to all parts of the plants.
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518. The unit of measurement used to express the thickness of ozone layer is
A
Newton metre
B
Decibel unit
C
Dobson unit
D
Poise
The Dobson Unit is a way to describe how much ozone there would be in the column if it were all squeezed into a single layer. The average amount of ozone in the atmosphere is roughly 300 Dobson Units, equivalent to a layer 3 millimeters (0.12 inches) thick—the height of 2 pennies stacked together
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519. Motion of a pendulum is an example of
A
Linear motion
B
Circular motion
C
Rotational motion
D
Periodic motion
A simple pendulum consists of a relatively massive object hung by a string from a fixed support. It typically hangs vertically in its equilibrium position. The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.
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520. Which of the following waves require a medium to travel?
A
Microwaves
B
X-rays
C
Light Waves
D
Sound Waves
Sound and water waves are mechanical waves; meaning, they require a medium to travel through.
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521. The secretion produced by the glands in the lining of stomach in human beings is called
A
Succus entericus
B
Bile Juice
C
Gastric Juice
D
Insulin
Gastric Glands are present in the wall of the stomach that release secretions for digestion of food.
The gastric glands produce gastric juice which contains three substances:
1. Hydrochloric acid
2. Pepsin Enzyme 3.
Mucus.
Due to presence of HCl, the gastric juice is acidic in nature . In acidic medium, the enzyme pepsin begins the digestion of proteins present in food to form smaller molecules . HCl kills any bacteria which may enter the stomach. The mucus helps to protect the stomach wall from its own secretion of HCl.
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522. Which of the following statements is TRUE about transverse waves?
A
In transverse waves, the particles in the medium move parallel to the direction of propagation of wave
B
The transverse wave moves in the form of crest and troughs
C
The transverse waves move in the form of compressions and rarefactions
D
The transverse waves propagate in a medium which possesses elasticity of volume
The transverse wave moves in the form of crest and troughs
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523. The combustion of fossil fuels at power plants is the main source of emission of which of the following gases?
A
Carbon Monoxide
B
Sulphur Dioxide
C
Methane
D
Nitrous Oxide
Carbon dioxide (CO2) makes up the vast majority of greenhouse gas emissions from the sector, but smaller amounts of methane (CH4) and nitrous oxide (N2O) are also emitted. These gases are released during the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.
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524. Which of the following conventions/ protocols is related to the protection of ozone layer?
A
Vienna Convention, 1985
B
Nagoya Protocol, 2010
C
Kyoto Protocol, 1997
D
Geneva Convention, 1979
Vienna Convention for the Protection of the Ozone Layer, (22 March 1985)
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525. Which of the following substances can exist as solid, liquid and gas?
A
Camphor
B
Wood
C
Water
D
Nitrogen
Water is the only common substance that is naturally found as a solid, liquid or gas. Solids, liquids and gases are known as states of matter
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526. A lake is a type of
A
lotic ecosystem
B
lentic ecosystem
C
Marine ecosystem
D
Terrestrial ecosystem
Lake ecosystems are the primary example of lentic ecosystems. Lentic Ecosystem involves natural resources i.e. lakes and ponds. Lentic word refers to stationary bodies or still water. This ecosystem involves biotic as well as abiotic components.
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527. Elements are generally available in the earth`s crust. Which of the following is a man-made element that is not available naturally in the earth`s crust?
A
Uranium
B
Thorium
C
Nobelium
D
Moylbednum
Nobelium is a synthetic chemical element with the symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series.
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528. Have you ever wondered, trucks carrying heavy loads have more than four tyres! This is becuase more tyres increase the area of contact with the road and this results in reduced pressure on the tyres. Pressure plays an important role in our daily life. Which one of the following is NOT a unit of pressure?
A
Pascal (Pa)
B
Bar (b)
C
Torr (mmHg)
D
Newton (N)
Newton is not the unit of pressure. It is the unit of force. Atmosphere, torr and pascal (Pa) are the units of pressure.
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529. An amazing fact about firefighter`s uniform is that it can withstand up to 2200 degree F and protects a person from concentrated acids and alkali absorption. Hence it is fires. Which one of the following gases is used to extinguish fire?
A
Hydrogen
B
Butane
C
Methane
D
Carbon Dioxide
Carbon dioxide (CO2) is stored in extinguishers in the liquid phase. It vaporizes when released thereby smothering a fire by excluding the air (oxygen) needed for combustion
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530. Vector borne diseases account for more than 17% of all infections diseases, causing more than 700000 deaths annually. Which of the following disease is
NOT vector borne?
A
Dengue
B
Chikungunya
C
Filariasis
D
Cholera
Vector borne diseases:
Dengue, Filariasis, Chikungunya
Non vector borne disease:
Cholera
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531. Chandan wants to design a solar furnace that will focus sunlight at one spot to boil water. Which of the following should Chandan use to collect large amount of solar enery?
A
Concave Mirror
B
Convex Mirror
C
Plane Mirror
D
Biconvex lenses
A concave mirror is used in the design of solar furnaces because they converge the parallel sun rays at a point. This helps to increase the temperature of the furnace. Temperature can reach upto 3500 degree C
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532. Earthing wire is used in AC power circuit wring for protective grounding. Which colour insulation is done over it as per BIS code?
A
Green and Yellow
B
Blue and Brown
C
Black and Red
D
White and Gray
The colour of earth wire is generally green in colour green wire stands for grounding / earthing in an electric circuit.
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533. In human, there are 13 vitamins which re essential for healthy living. Bleeding of gums and delayed healing of wounds is a deficiency of which of the following Vitamins?
A
Vitamin A
B
Vitamin B
C
Vitamin C
D
Vitamin D
Scurvy happens when there is a lack of vitamin C, or ascorbic acid. The deficiency leads to symptoms of weakness, anemia, gum disease, and skin problems. This is because vitamin C is needed for making collagen, an important component in connective tissues.
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534. Which of the following substances is used in cold countries to melt ice accumulated on the roads during winter?
A
salt
B
urea
C
sand
D
oil
Salt lowers the freezing point of ice below zero degree.
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535. Kmph is the unit to measure
A
speed
B
acceleration
C
momentum
D
mass
speed = distance / time
speed = km / hr
speed = kmph
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