Q. Old pollutant amongst the following is
A) $SO_{2}$
B) $CO_{2}$
C) $CO$
D) Acid rain
Explanation
Acid rain is a liquid pollutant, whereas $SO_{2},CO$ and $CO_{2}\$are gaseous pollutants.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.