Q39. State some characteristics of petroleum.


Q40. Explain the process of formation of petroleum.


How is natural gas formed?


Q41. Write uses of coal tar.


Q42. What are the uses of coal?


State some uses of coal.


Q43. What are the advantages of using CNG and LPG as fuels?


Q44. State some of the tips of PCRA to conserve petrol and diesel.


Give the tips advised by PCRA to save petrol/diesel while driving.


Q45. Describe how coal is formed from dead vegetation. What is this process called?


Where do we get coal from and how is it formed?


Q46. Distinguish between inexhaustible and exhaustible natural resources.

Last modified: Tuesday, 14 May 2019, 8:26 PM