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Coal And Petroleum

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Class 10 Class 12

Fossil fuels are ________, ________ and ________.


coal

,

petroleum

,

natural gas


Name the petroleum product used for surfacing of roads.


Bitumen or coaltar is used for surfacing of roads.


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


Millions of years ago, dense forest and animal got buried under the soil due to natural process like floods, earthquakes and thunder storms. When they got buried deep in the soil, they were exposed to very high pressure and temperature. Under these conditions, these slowly got converted into coal. This process of formation of coal vegetation is called carbonization. 


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


Advantages of CNG—Compressfed Natural Gas and LPG—Liquefied Petroleum Gas:

i) They burnt with clean flame and does not produce smoke.

ii) They give more heat and energy as compare to other fuels.  


Process of separation of different constituents from petroleum is called __________.


refining