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1. 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

2. 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

3. 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

4. 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

5. 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

6. Sudden increase in temperature during the day is prevented by the

A

Atmosphere

B

Clouds

C

Rain

D

Acid Rain

7. Which of the following quantities has only magnitude?

A

Momentum

B

Speed

C

Velocity

D

Force

8. Which of the following radiations has the highest penetrating power?

A

Infrared Radiation

B

Alpha Radiation

C

Gamma Radiation

D

Beta Radiation

9. Which of the following vitamins is also known as Ascorbic Acid?

A

Vitamin C

B

Vitamin B1

C

Vitamin B2

D

Vitamin B6

10. Which type of energy source is tidal energy?

A

Non-Renewable

B

Conventional

C

Exhaustible

D

Non-Conventional

11. Which of the following quantities is conserved in Bernoulli`s theorem?

A

Linear Momentum

B

Weight

C

Energy

D

Angular Momentum

12. What is the chemical symbol of Iron?

A

In

B

Cu

C

Ir

D

Fe

13. Which of the following states of matter has the strongest intermolecular forces?

A

Plasma

B

Gas

C

Liquid

D

Solid

14. In which layer of the earth`s atmosphere do precipitation occur?

A

Mesosphere

B

Exosphere

C

Stratosphere

D

Troposphere

15. The process of removal of metabolic waste from the body is known as ______

A

Gastrulation

B

Excretion

C

Photosynthesis

D

Digestion

16. Which of the following terms denotes the decomposed organic matter?

A

Humus

B

Litter

C

Explant

D

Callus

17. Which of the following group of animals get nutrition by feeding on both plants and animals?

A

Carnivores

B

Omnivores

C

Autotrophs

D

Herbivores

18. Light year is the unit of measurement of ___

A

Time

B

Acceleration

C

Velocity

D

Distance

19. The amount of electric current flowing per unit area is called ___

A

Current Density

B

Electrical Resistivity

C

Electrical Power

D

Electric Potential

20. Which of the following is known as black gold?

A

Petroleum

B

Coal

C

Wood

D

Biofuel