2018
Q1
AIIMS
MCQ
10 Mar 2026
Assertion (A) : The pH of acid rain is less than 5.6.
Reason (R) : Carbon dioxide present in the atmosphere dissolves in rain water and becomes carbonic acid.
A.
Both (A) and (R) are true and (R) is the correct explanation of (A).
B.
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C.
(A) is true and (R) is false.
D.
Both (A) and (R) are false.