Question

All combustible substances are not fuels. Why?

Answer 1

hey frnd! ! ! ! ! ! ! !

ur answer is all combustible substance are not fuel. ... 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.

Answer 2

Here is your answer:-

All combustible substances are not fuels because fuels are those combustible substances that can be used to run vehicles where as any other combustible substance cannot be used to run vehicles, they just give off heat and not enough energy to run vehicles .

hope it helps you...

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