Which of the following statements is/are correct about solubility
Where k is equilibrium constant for the reaction ${\mathrm{ZnS}}_{\left(\mathrm{s}\right)}+2{\mathrm{H}}_{\mathrm{aq}}^{+}\rightleftharpoons {\mathrm{Zn}}_{\mathrm{aq}}^{+2}+{\mathrm{H}}_2{\mathrm{S}}_{\mathrm{aq}}$

Solubility of CaF₂ is more in buffer solution of pH = 3 than in pure water

Solubility of ZnS in water depends on pH of solution

Solubility of AgCl increase in presence of sodium thiosulphate

Solubility of ZnS in the presence of H⁺ ion can be derived by $\mathrm{k}=\frac{\left[{\mathrm{zn}}^{+2}\right]\left[{\mathrm{H}}_2\mathrm{S}\right]}{{\left[{\mathrm{H}}^{+}\right]}^2}$