10. Name the petroleum product used as fuel for stoves, lamps and jet aircrafts.
11. Write two important uses of coke.
12. What is meant by refining of petroleum?
13. What is natural gas?
14, Why should fossil fuels be used judiciously?
15. What is coke? How is it obtained?
16. How is coal gas obtained? List its uses.
17. How is coal tar obtained? List its uses.
18. How is natural gas useful?
19. How can you conserve petrol and diesel?​