What is coal?


Coal is an exhaustible natural fossil fuel which is a tough, porous and black substance. It is almost pure form of carbon.

 

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Why is CNG considered an eco-friendly fuel?


CNG is clean gas. On burning, it does not produce any smoke and leaves no ash. Therefore, CNG is considered eco-friendly fuel.

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Which process converts dead vegetation into coal?


Carbonisation is the process which convert dead vegetation into coal.

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Where in India is CNG found?


Tripura, Jaisalmer, Offshore of Mumbai and in Krishna Godawari Delta.

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What is the name of the process of separating the different constituents of petroleum?


It is called refining.

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