Question

what is combution and fule?

Answer 1

Same as complete combustion, water is produced by incomplete combustion. However, carbon and carbon monoxide are the products instead of carbon dioxide. For most fuels, such as diesel oil, coal or wood, pyrolysis occurs before combustion.

Answer 2

Hey your answer is here:-
The chemical process in which substance burns in air or in oxygen to produce heat and light energy is called combustion.
And fuels are the materials which on heating in presence of oxygen cathes fire easily and produce heat and light energy.
Hope it helps you !!✌✌