What are the advantages of using CNG and LPG as fuels?
Name the petroleum product used for surfacing of roads.
Describe how coal is formed from dead vegetation. What is this process called?
Fossil fuels are ________, ________ and ________.
Process of separation of different constituents from petroleum is called __________.
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(i) Coke burns without producing smoke whereas coal produces a lot of smoke on burning
(ii) Coke has a higher calorific value than coal.
(iii) Coke burns more readily than coal.
(iv) Coke leaves much less ash in burning as compared to coal.