Which of the following salts will not undergo hydrolysis?

The degree of hydrolysis of a $0.1 \ M$ solution of $ArNH_3^+ Cl^-$ is $0.01$. Find the degree of hydrolysis in a $0.4 \ M$ solution of $ArNH_3^+ Cl^-$.

Which of the following salts on dissolution in water gives $pH$ less than $7$ at $298 \ K$?

If $0.1 \, M \, CH_3COONa$ undergoes $1 \%$ hydrolysis,then the values of $[OH^{-}]$,$[H^{+}]$,and $pH$ are respectively:

The degree of hydrolysis in hydrolytic equilibrium $A^{-} + H_2O \rightleftharpoons HA + OH^{-}$ at salt concentration of $0.001 \ M$ is $(K_a = 1 \times 10^{-5})$

$NH_4CN$ is a salt of a weak acid $HCN$ $(K_a = 6.2 \times 10^{-10})$ and a weak base $NH_4OH$ $(K_b = 1.8 \times 10^{-5})$. $A$ $1 \ M$ solution of $NH_4CN$ will be: