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Q. How many of the following salt(s) do NOT undergo hydrolysis?
$NaNO _{3}, NH _{4} HCO _{3}, CuSO _{4}, KCN , CH _{3} COONa$, $K _{2} SO _{4}$

Equilibrium

Solution:

Salts of strong acids and strong bases do not undergo hydrolysis. Among the given salts, only $NaNO _{3}$ and $K _{2} SO _{4}$ are salts of strong acids and strong bases (i.e., they do not undergo hydrolysis).