5 differences between combustible and non - combustible substances . 

Combustible substances:- Substances which burn in air to produce heat and light are called combustible substances.
Eg :- wood, coal, charcoal, kerosene, petrol, diesel, liquified petroleum gas (LPG), compressed natural gas (CNG) etc.

The substances in which no combustion takes place are called non-combustible substances. I.e Substances like stone, glass, iron nails, etc. do not burn on being exposed to flame. Such substances are called non-combustible substances.

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combustible substance is a liquid substance having a flash point and non combustible substance are not ignited
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