Question

Define briefly the Rapid combustion and spontaneous combustion

Answer 1

when the combustible substance burns rapidly .Such a combustion is called rapid combustion .Example- a matchstick or petrol burns rapidly . The substance which burn in air on their own are called spontaneous combustion . example- phosphorus

Answer 2

Rapid combustion is a form of combustion, otherwise known as a fire, in which large amounts of heat and light energy are released, which often results in a flame. 2 spontaneous ignition is a type of combustion which occurs by self-heating