Time Left : 00:00

Question Numbers



  • CURRENT QUESTION
  • NOT VISITED
  • ATTEMPTED
  • NOT ATTEMPTED
Back To Main Page
1. Which radiation of sunlight is used in heating of a solar cooker?

A

Ultraviolet rays

B

Infrared rays

C

Microwaves

D

Gamma rays

2. The loudness of sound is measured in units called

A

Hertz

B

ohms

C

Decibels

D

Moles

3. Esters are formed by reaction of

A

Alcohol and acid

B

acid and base

C

ketone and alcohol

D

alcohol and aldehyde

4. Anhydroud calcium chloride is a

A

drying agent

B

hydrating agent

C

carboxylating agent

D

decarboxylating agent

5. Which of the following plants belongs to the grass family?

A

Bamboo

B

Alicia

C

Aloe Vera

D

Hibiscus

6. Vinegar contains

A

Acetic Acid

B

Hydrochloric acid

C

Citric acid

D

Phosphoric acid

7. Which among the following is poor conductor of heat?

A

Gold

B

Silver

C

Copper

D

Glass

8. 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

9. Cell phones (including smartphones) give off a form of energy known as

A

Gamma rays

B

X-rays

C

Radio frequency waves

D

microwaves

10. The element which exhibits catenation property is

A

Sodium

B

Magnesium

C

Carbon

D

Nitrogen

11. Ethanoic acid is also called as

A

Acetic Acid

B

Ethanol

C

Methanol

D

Glycol

12. 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

13. When magnesium ribbon is burnt in presence of air, it forms

A

White flame

B

red flame

C

green flame

D

blue flame

14. Sodium is obtained/isolated from its metal chloride ore by the process of

A

Electrolysis

B

Hydrolysis

C

Carboxylation

D

Decarboxylation

15. The formation of patina on copper results in which of the following colours?

A

Magenta

B

White

C

Red

D

Green

16. Aspirin is prepared by using

A

Salicylic acid

B

Sulphuric Acid

C

Hydrochloric Acid

D

Acetic Acid

17. Table sugar is the commonly used sweetner in households. The chemical name for this sugar is

A

Sucrose

B

Glucose

C

Dextrose

D

Maltose

18. Tooth decay starts when pH of mouth

A

drops below 5

B

rises above 6

C

rises above 8

D

rises above 10

19. Unsaturated carbon compound when burnt gives

A

blue flame

B

green flame

C

yellow flame

D

no flame

20. 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