JEE Main Chemistry question

The best explanation for the solubility of MnS in dil. HCl is that:

(A)Solubility product of MnCl₂ is less than that of MnS
(B)Concentration of Mn²⁺ is lowered by the formation of complex ions with chloride ions
(C)Concentration of sulphide ions is lowered by oxidation to free sulphur
(D)Concentration of sulphide ions is lowered by formation of the weak acid H₂SCorrect

Answer: (D)

Solution

Added H⁺ converts S²⁻ to weakly-dissociated H₂S, lowering [S²⁻] and shifting MnS dissolution forward.

Question ID VK-136484