Which of the following cation does not give precipitate with H2S in neutral medium? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Hypophosphoric acid (H4P2O6) contains phosphorus in the +4 oxidation state. Hydrolysis of H4P2O6 at room temperature yields a mixture of phosphorous acid (H3PO3) and phosphoric acid (H3PO4). Step 2: Phosphorous acid has the "-ous" suffix, and phosphoric acid has the "-ic" suffix. Step 3: Thus, the reaction produces two oxyacids of phosphorus: one with the "-ic" suffix and the other with the "-ous" suffix, corresponding to option (c).