Question 1559 Deck General

The correct answer is B) autoignition temperature. The autoignition temperature is the minimum temperature required to ignite a gas or vapor without the presence of a spark or flame. This is the temperature at which the substance will spontaneously ignite and combust, even in the absence of an external ignition source. The other options are incorrect: A) Flash point refers to the lowest temperature at which a liquid produces enough vapor to form an ignitable mixture with air. C) Lower explosive limit is the lowest concentration of a gas or vapor in air that can result in an explosion. D) Fire point is the lowest temperature at which a substance will continue to burn after being ignited.