how are fuels classified?give two examples of each.
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Answer:
On the basis of physical state of fuel they are classified into solid, liquid, gaseous state.
Example: Solid:- ⟶ Wood, cowdung cakes and agricultural waste.
Liquid:- Kerosene, diesel and petrol.
Gaseous:- Biogas, CNG and LPG.
Explanation:
Based on their occurrence they are classified as natural and artificial fuel. Wood, natural gas and petroleum are the example of natural fuel whereas coal tar, producer gas tanbark are the example of artificial fuels. Note: The energy produced by the combustion of one kilogram of fuel is known as its calorific value.
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