Chemistry - Ionic Equilibrium Question with Solution | TestHub

$$\begin{array}{rl}& {\mathrm{NaClO}}_4\to {\mathrm{Na}}^{+}+{\mathrm{ClO}}_4^{-}\\ & {\mathrm{NaClO}}_3\to {\mathrm{Na}}^{+}+{\mathrm{ClO}}_3^{-}\\ & {\mathrm{NaClO}}_2\to {\mathrm{Na}}^{+}+{\mathrm{ClO}}_2^{-}\\ & \mathrm{NaClO}\to {\mathrm{Na}}^{+}+{\mathrm{ClO}}^{-}\end{array}$$ In aqueous solution, these compounds decompose into ions. ${\mathrm{ClO}}_4^{-}$will most easily abstract proton from water molecules. So it will be most acidic.