Question

A substance with an ignition temperature of 55${}^0$C will undergo spontaneous combustion at room temperature.

• A. True
• B. False

Answer 1

The correct option is B False

A certain minimum temperature is required to initiate a combustion reaction. This temperature is called ignition temperature.
When ignition temperature is lesser than the room temperature, spontaneous combustion takes places on its own. Room temperature is approximately 25 ${}^0$C -35 ${}^0$C. So, room temperature is lower than the ignition temperature of the substance. Hence, the substance will not undergo spontaneous combustion.