Concentration of NH₄Cl  salt solution in which degree of hydrolysis of NH₄Cl salt is highest at 298K is ?

NH₄Cl is salt of weak base and strong acid

$\mathrm{h} = \sqrt{\frac{{\mathrm{K}}_{\mathrm{w}}}{{\mathrm{K}}_{\mathrm{b}}\mathrm{C}}}$

$\mathrm{h}\infty \frac{1}{\sqrt{\mathrm{C}}}$

less is concentration of salt more is degree of hydrolysis(h)