Question

Which among the following oxoacids of phosphorus shows a tendency of disproportionation?

विकल्प

• Phosphinic acid (H₃PO₂)

• Orthophosphoric acid (H₃PO₄)

• Phosphonic acid (H₃PO₃)

• Pyrophosphoric acid (H₄P₂O₇)

Answer 1

Phosphonic acid (H₃PO₃)

Explanation:

\[\ce{\underset{(Phosphonic acid)}{4H3PO3} -> 3H3PO4 + PH3}\]

\[\ce{H3PO3 -> H3PO4}\] (oxidation)

\[\ce{H3PO3 -> PH3}\] (reduction)