Question

Rapid combustion is:

• A. when gas burns, it produces heat and light.
• B. when material suddenly burst into flames.
• C. when there is evolution of heat.
• D. none of these.

Answer 1

The correct option is A when gas burns, it produces heat and light.

Combustion in which a substance burns rapidly and produces heat and flame is known as rapid combustion. Example: combustion of LPG gas, petrol, etc. Substances which undergo rapid combustion have lower ignition temperature.