Identify the correct order of solubility in aqueous medium: CuS > ZnS > Na2S, ZnS > Na2S > CuS, Na2S > CuS > ZnS, Na2S > ZnS > CuS

The correct order of solubility in aqueous medium is Na2S > ZnS > CuS. The percentage ionic character in Na2S is maximum. Hence, it undergoes hydration to a maximum extent. Hence, it has a maximum solubility.