If salt Q undergoes redox reaction with H2S in acidic medium then which of the following species can — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Pyrophosphorous acid (H4P2O5) contains phosphorus in the +3 oxidation state. Step 2: Hydrolysis of H4P2O5 yields phosphorous acid (H3PO3). Step 3: Since phosphorous acid is an oxyacid with a '-ous' suffix, the correct option is (b).