JEE Main Chemistry question

Chemistry Equilibrium JEE Main

Pure water is kept in a vessel and it remains exposed to atmospheric CO₂ which is absorbed. Then the pH will:

(A)Be greater than 7
(B)Be less than 7Correct
(C)Be 7
(D)Depend on ionic product of water

Answer: (B)

Solution

Dissolved CO₂ forms carbonic acid, lowering pH below 7.

Question ID VK-136269