Problem

Match the following:

Column-I	Column-II
(A) $\text{Na}_2\text{B}_4\text{O}_7 \cdot 10\text{H}_2\text{O}$	(P) Basic solution
(B) $\text{Na}_2\text{CO}_3$	(Q) Acidic solution
(C) $\text{K}_2\text{SO}_4 \cdot \text{Al}_2(\text{SO}_4)_3 \cdot 24\text{H}_2\text{O}$	(R) can react with NaOH
(D) $\text{NH}_4\text{Cl}$	(S) Swells up on heating