48. Assertion (A) Aqueous solution of ammonium carbonate is basic.

Reason (R) Acidic/basic nature of a salt solution of a salt of weak acid and weak base depends on Ka and Kb value of the acid and the base forming it.

(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 but R is false

(d) Both A and R are false


(a) Both assertion and reason are true and reason is the correct explanation of assertion.
If Kb of NH4OH>Ka of H2CO3
The solution is basic.
or, If Ka of H2CO3>Kb of NH4OH; the solution is acidic.