Question

All fuels are not combustible substances? Why?

Answer 1

hlo mate here is your answer.

A combustible substance is the one which can burn. It does notnecessarily mean that it would produce large amount of heat without leaving any residue. Thus all fuels arecombustible but not all combustible substances are fuels.

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Answer 2

A combustible substance is the one which can burn. It does notnecessarily mean that it would produce large amount of heat without leaving any residue. Thus all fuels arecombustible but not all combustible substances are fuels.

Thank you for asking the question.