Answer:
Solid Fuels: Examples are wood and coal. These are used to cook food in homes. Coal is also used in industries Liquid Fuels: Examples are kerosene and petrol. Kerosene is used in stoves and in lamps to cook food and petrol is used as a fuel in automobiles. Gaseous Fuels: Examples are natural gas and petroleum gas. These are used in industries. CNG is used to run automobiles.
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