Which salt can furnish $\mathrm{H}^{+}$in its aqueous solution?

Question

Professor PC Thomas Classes · Answer

(c) $\mathrm{H}_3 \mathrm{PO}_2$ and $\mathrm{H}_3 \mathrm{PO}_3$ are mono and dibasic acids. Hence, $\mathrm{NaH}_2 \mathrm{PO}_2$ and $\mathrm{Na}_2 \mathrm{HPO}_3$ are normal salts, while $\mathrm{Na}_2 \mathrm{HPO}_4$ is acid-salt as one proton is there in the compound.