Question

What is meant by rapid combustion? Give an example.

Answer 1

Rapid combustion is the type of combustion which takes place rapidly i.e. occurring in a short amount of time. It is the combustion that occurs instantly; giving out heat and light.

Complete answer:
Let us have a brief knowledge about combustion before actually answering the illustration;
Combustion-
It is an exothermic oxidation reaction in which a substance chemically combines with oxygen to give heat and light as the results.
Rapid combustion-
It is a type of combustion occurring instantly, when an external source of energy is applied to it; generally, fuel.
Examples of rapid combustion-
Lighting a candle
Burning of kerosene oil
Immediate burning of cooking gas (LPG)
Burning of matchstick
Burning of CNG

Note:
In simpler language, rapid combustion is also known as fire and when the heat and light is released during the process, it results in flames.
Do note that there are other types of combustions also rather than that of rapid combustion, they are;
Complete combustion (combustion taking place in unlimited supply of oxygen)
Incomplete combustion (combustion taking place in limited supply of oxygen)
Spontaneous combustion (occurs spontaneously, without any external source)
Explosive combustion (occurs very fast producing heat, light and sound together)