Q. The noble gas which is not found in atmosphere?
A) Ne
B) Ar
C) Rn
D) Kr
Explanation
(c)
Noble gases are present in atmosphere in minute quantities except Rn, which is radioactive and is formed by decay of Ra.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.