Aqueous solution of KCl is neutral because

$$\begin{gathered} {\mathrm{K}}^{+}+{\mathrm{Cl}}^{-}+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{K}}^{+}+{\mathrm{OH}}^{-}+{\mathrm{H}}^{+}+{\mathrm{Cl}}^{-}; \\ {\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}^{+}+{\mathrm{OH}}^{-}; \end{gathered}$$

Both the basic radical and acid radical are derived from strong base and strong acid respectively, so both of them will not undergo hydrolysis.