Which of the following statements is correct regarding ignition temperature?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → It is the lowest temperature at which a substance catches fire.
The ignition temperature of a substance is the lowest temperature at which it catches fire. Below this temperature it does not burn; at or above it, it burns as long as air is present. A substance with a low ignition temperature, such as petrol, catches fire easily.