Q. Which of the following is kept in water?
A) White phosphorus
B) Sodium
C) Potassium
D) Calcium
Explanation
(a)
$\therefore\$White phosphorus is most reactive and most important allotrope of phosphorus. It is insoluble in water. $\therefore$It is kept in water to prevent it from catching fire.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.