Chemistry - Ionic Equilibrium Question with Solution | TestHub

Based on${\mathrm{K}}_{\mathrm{s}\mathrm{p}}$value the correct order of solubility is given as
$\mathrm{N}{\mathrm{a}}_2\mathrm{S}>\mathrm{Z}\mathrm{n}\mathrm{S}>\mathrm{C}\mathrm{u}\mathrm{S}$