Question

what is combustion and their types

Answer 1

combustion is burning of a thing
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Answer 2

$\huge\underline\bold\orange{Answer:}$

$\textbf{\underline{\underline{Combustion :}}}$

$\implies$ The chemical process in which a substance burns in air, or oxygen, with the release of heat and light energy is called Combustion

$\textbf{\underline{\underline{Types\:Of\:Combustion : }}}$

$\star$ Slow Combustion - When a combustible substance burns at a slow, or moderate rate its combustion is called Slow Combustion.

Example - Burning Of Cowdung Cakes

$\star$ Rapid Combustion - When a combustible substance burns at a fast rate,its combustion is called Rapid Combustion.

Example - Gaseous Fuels

$\star$ Spontaneous Combustion- When a Combustible Substance catches fire on its own, even at room temperature, it's combustion is referred to as Spontaneous Combustion.

Example - Sodium Metal

$\star$ Explosive Combustion- When a mixture of a combustible material and air burns completely, in a very short span of time in a closed space, an explosive combustion can take place.

Example - Ignition of Cracker.