General Knowledge SCIENCE QUESTIONS for RAILWAY, SSC CHSL EXAM 2018 - Videos

ईंधन fuel
A fuel is any material that can be made to react with other substances so that it releases chemical or nuclear energy as heat or to be used for work.

There are four types of coals which are Anthracite, bituminous, lignite and peat

The best variety of coal is Anthracite coal
Petroleum gas is a mixture of – Butane, Propane, and Ethane

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