Question

distinguish between combustible and noncombustible substances

Answer 1

substances that catch fire and burns easily is called combustible substance.
ex-paper,garments,wood , LPG etc.

substances that wont touch or consume and burst into flames easily are called non combustible substances.
ex-rock,steel,water,sand etc.

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Answer 2

Hello Madam/Sir

Here is ur Answer, hope you like it

The difference between complete & Incomplete combustion is when the supply of air or oxygen is poor . Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. ... Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.

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