General Science #18 Multiple Choice Questions

GENERAL SCIENCE #18

MULTIPLE CHOICE QUESTIONS

1. What are called the resources present in unlimited quantity in nature and are not likely to be exhausted by human activities?

(a) Exhaustible resources

(b) Inexhaustible natural resources

(c) Exhaustible natural resources

(d) None of the above

Answer: (b)

2. Coal, petroleum and natural gas are examples of which of the following?

(a) Exhaustible natural resources

(b) Expensive resources

(c) Inexhaustible natural resources

(d) None of the above

Answer: (a)

3. Naphthalene balls used to repel moth and insect is derived from which of the following?

(a) LPG

(b) Petroleum

(c) Coal tar

(d) Sugar

Answer: (c)

4. What is the full form of CNG?

(a) Confirmed Natural Gas

(b) Compressed Natural Gas

(c) Condemned Natural Gas

(d) Combined Natural Gas

Answer: (b)

5. What is called the slow process of conversion of dead vegetation into coal?

(a) Carbonisation

(b) Coalification

(c) Fuelification

(d) None of the above

Answer: (a)

6. In India, Petroleum deposit was first found in which state?

(a) West Bengal

(b) Rajasthan

(c) Assam

(d) Maharashtra

Answer: (c)

7. Why is the use of CNG in automobile better than petrol?

(a) Less polluting

(b) Cannot be adulterated

(c) Cheaper

(d) All of the above

Answer: (d)

8. What should one do to reduce fuel consumption in automobile?

(a) Not switch off the engine at traffic lights

(b) Not check tyre pressure regularly

(c) Drive very fast to reach early

(d) Ensure proper maintenance of the vehicle

Answer: (d)

9. Black gold is actually which of the following?

(a) Gold sold in black market

(b) Petroleum

(c) Diamond

(d) Gold which becomes black on burning

Answer: (b)

10. The earth’s temperature is increasing due to global warming due to which of the following?

(a) The earth slowing moving towards the sun

(b) Less duration of winter every year

(c) Increased use of fossil fuel

(d) The sun is giving out more heat

Answer: (c)

11. What is called the chemical process in which a substance reacts with oxygen to give off heat?

(a) Conjunction

(b) Confusion

(c) Combustion

(d) Conduction

Answer: (c)

12. Fuel may be which of the following?

(a) Solid only

(b) Liquid only

(c) Gas only

(d) Solid, liquid or gas

Answer: (d)

13. The amount of heat energy produced on complete combustion of …………… fuel is called its calorific value.

(a) 1 millilitre

(b) 1 kg

(c) 1 gram

(d) 1 litre

Answer: (b)

14. `What are called the substances which have very low ignition temperature and can easily catch fire with a flame?

(a) Inflammable substances

(b) Fire proof substances

(c) Flaming substances

(d) None of the above

Answer: (a)

15. When we heat water in a paper bowl over a candle, why the paper does not catch fire?

(a) Paper gets wet

(b) Paper is not inflammable

(c) Due to water the ignition temperature of paper is not reached

(d) None of the above

Answer: (c)

16. When oil or petrol catches fire, why water is not used to extinguish it?

(a) Water gets mixed with oil ad increases fire

(b) Water is heavier than oil/petrol and so remains below the oil layer which continues to burn

(c) Water gets evaporated

(d) Water covers oil and oil burns under water layer which may not be noticeable

Answer: (b)

17. What is produced in combustion?

(a) Both heat and light

(b) Only light

(c) Only heat

(d) None of the above

Answer: (a)

18. Why a person caught fire on clothes is wrapped with blanket?

(a) To hide the burnt body parts

(b) The person’s clothes get burnt

(c) The person suddenly feels cold

(d) To reduce air supply and put fire off

Answer: (d)

19. What is ignition temperature?

(a) The temperature in the substance when fire is put off

(b) The minimum temperature at which a substance catches fire

(c) The maximum temperature at which a substance catches fire

(d) The temperature of burning substance

Answer: (b)

20. Explosion takes because of which of the following?

(a) Release of large amount of gas under pressure due to sudden reaction

(b) Release of large amount of light

(c) Release of large amount of heat

(d) None of the above

Answer: (a)