Coal & Petroleum

Coal and petroleum Worksheet-7

11. Why is petroleum also known as ‘black gold’?

12. Can we make coal and petroleum in the laboratory from dead organisms?

13. Give two disadvantages of using fossil fuels.

14. Why should the fossil fuels be used with care?

15. What is meant by fractional distillation? What is the principle on which it is based?

16. Name two places in India where oil wells are found?

Coal and petroleum Worksheet-8

1. What is CNG? Give its one use.

2. Why do green leaves not catch fire easily?

3. How have fossil fuels been formed?

4. Give one reason why LPG is a better fuel than coal.

5. Give one advantage of modern chullah over traditional chullah.

6. Give one main advantage of CNG.

Coal and petroleum Worksheet-9

Fill in the blanks:

1. Process of separation of different constituents from petroleum is called ____.

2. Least polluting fuel for vehicle is _____.

True / False:

3. Fossil fuels can be made in the laboratory.

4. CNG is more polluting fuel than petrol.

5. Coke is almost pure form of carbon.