Question

White phosphorus catches fire on even slight heating​

Answer 1

Explanation:

White phosphorus is highly reactive, and spontaneously ignites at about 30°C in moist air. It is usually stored under water, to prevent exposure to the air. ... Red phosphorus is stable at room temperature, but can be converted to the more reactive white phosphorus by heat, sunlight, or friction.

Answer 2

Explanation:

as it is very reactive towards air