Question

The lowest temperature at which a substance catch the fire is called its ________.

• A.
  Boiling point
• B.
  Melting point
• C.
  Critical temperature
• D.
  Ignition temperature

Answer 1

The correct option is D

Ignition temperature

The minimum temperature at which a substance catches fire and burns is called its ignition temperature.
A substance will not catch fire and burn if its temperature is lower than its ignition temperature. Different substances have different ignition temperatures.