What are Combustible and Incombustible Substances?

Last updated at April 16, 2024 by Teachoo

The substance which undergoes combustion is called combustible substance

Or, in easy language

Substance which can burn in air is called combustible substance

Example - Petrol, Diesel, Kerosene oil, Charcoal, Wood, Alcohol, Magnesium

Similarly,

Those substances which cannot burn in air are called incombustible substance

Example - Stone, Glass, Cement, Brick, Water, Sand

A combustible substance is also called fuel

Difference between Combustible and Noncombustible Substance

Combustible substance	Non Combustible Substance
Substance which reacts with oxygen to produce heat and light is called combustible substance	Substance which does not react with oxygen to produce heat and light is called Non combustible substance
In easy language, those substance which burn in air (or undergo combustion)are called combustible substance	In easy language, those substance which do not burn in air (or do not undergo combustion)are called non combustible substance
Example - Magnesium, Coal, Kerosene	Example - Glass, Stone

Questions

NCERT Question 1 - List conditions under which combustion can take place.
View Answer