Question

All cumbustible substances are not fuel why
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Answer 1

Answer:

all combustible substance are not fuel. why? ... Combustible substances are those which can burn.It is not necessary that they will produce a large amount of heat without leaving any residue on combustion. Hence all fuels are combustible but all combustible substances are not fuels.

Answer 2

Answer:

. Combustible substances are those which can burn.It is not necessary that they will produce a large amount of heat without leaving any residue on combustion. Hence all fuels are combustible but all combustible substances are not fuels.

Explanation:

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