Q. The element which catches fire in air at $30{^\circ}C$ and is stored under water is
A) Sodium
B) Phosphorus
C) Magnesium
D) Zinc
Explanation
(b)
Because of very low ignition temperature (303 K) of phosphorus it is always kept under water
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.