Assertion (A): When a solution of `CH_(3)COOH` in water is shaken with charcoal, `pH` of the solution will get decreased.
Reason (R) : The degree of ionisation of `CH_(3)COOH` increase.

Options

A. If both (A) and (R) are correc, and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If (A) is incorrect, but (R) is correct.

Answer

D

Explanation

`(A)` is false. `H^(o+)` ion from `CH_(3)COOH` are adsorbed on characoal thus decrease `[H^(o+)]` and hence `pH` is increases. `(R)` is true. Due to Le-Chatilier's principle, more and more `H^(o+)` ions are adsorbed, ionisation increases.