Pick out the stronger reducing agent among the following oxyacids of phosphorus

Pick out the stronger reducing agent among the following oxyacids of phosphorus

Options

(a) hypophosphorous acid
(b) phosphorous acid
(c) hypophosphoric acid
(d) pyrophosphorous acid

Correct Answer:

hypophosphorous acid

Explanation:

Reducing agent reduces other compounds and get itself oxidised. Compounds Oxidation state of P, Hypophosphorous acid (+1), Phosphorous acid (+3), Hypophosphoric acid (+4), Orthophosphoric acid (+5), Pyrophosphoric acid (+5). Hypophosphorous acid has least oxidation states so it has higher tendency to increase its oxidation state or to get oxidised so it acts as a strongest reducing agent.

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