What is a fuel? Give any two examples of fuels.

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Solution

Fuel:
Fuel is a combustible substance that burns and produces heat energy.
It reacts with other substances for producing thermal or heat energy. Then, this energy is used to perform work.
Burning fuel is one of the cheapest forms of energy.
Two examples of fuels:
Solid fuels: Coal, coke, cow-dung cake, wood, etc.
Liquid fuels: Petrol, Kerosene, Diesel, etc.

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