Class 8 Science Chapter 3: Coal and Petroleum
Mock Test

Section A: Multiple Choice Questions

1. Which of the following is a natural resource?

A) Plastic B) Coal C) Nylon D) PVC

2. Petroleum is mainly found:

A) Above the coal layer B) Below the coal layer C) Mixed with natural gas D) Only in deserts

3. Which is not a fossil fuel?

A) Coal B) Wood C) Petroleum D) Natural gas

4. The process of separating the different constituents/fractions of petroleum is known as:

A) Distillation B) Refining C) Filtration D) Sedimentation

5. Which of the following is used as a reducing agent in the extraction of metals?

A) Coke B) Bitumen C) Paraffin D) Kerosene

6. The purest form of carbon is:

A) Coal tar B) Coke C) Diamond D) Graphite

7. Which of these is NOT a product obtained from coal tar?

A) Naphthalene balls B) Synthetic dyes C) Petrol D) Perfumes

8. Which of the following is a non-renewable resource?

A) Wind energy B) Solar energy C) Coal D) Biomass

9. Compressed Natural Gas (CNG) is mainly used as:

A) Fertilizer B) Fuel for vehicles C) Raw material for plastics D) Refrigerant

10. Petroleum is also called:

A) Black gold B) White gold C) Liquid gold D) Blue gold

Section B: Assertion-Reason

11. Assertion (A): Petroleum is found in liquid state underground.
Reason (R): Petroleum is formed from the remains of plants only.

A) Both A and R are true, R is correct explanation of A B) Both A and R are true, R is not correct explanation of A C) A is true, R is false D) A is false, R is true

12. Assertion (A): Coal is used in thermal power plants.
Reason (R): Coal is a good conductor of electricity.

A) Both A and R are true, R is correct explanation of A B) Both A and R are true, R is not correct explanation of A C) A is true, R is false D) A is false, R is true

Section C: Short Answer (Self-Review)

13. Explain the process of formation of coal.

14. List two uses of coke.

15. Why is petroleum called a fossil fuel?

Section D: Higher Order Thinking (Self-Review)

16. A factory wants to reduce its dependence on non-renewable resources. Suggest two alternatives to coal and petroleum for energy and explain why they are considered renewable.

17. A city is planning to switch public transport from diesel to CNG. List two environmental benefits of this switch.

Answer Key (for Self-Review)

• 13. Coal is formed from the remains of plants buried under the earth millions of years ago, subjected to high pressure and temperature, converting them into coal (carbonization).
• 14. Coke is used in the extraction of metals and as a fuel in industries.
• 15. Petroleum is called a fossil fuel because it is formed from the remains of dead organisms (plants and animals) buried under the earth for millions of years.
• 16. Alternatives: Solar energy and wind energy; both are renewable because they are naturally replenished and do not deplete with use.
• 17. CNG produces less air pollution and reduces greenhouse gas emissions compared to diesel.