Question

Phosphorus trioxide reacts with hot water to give

• A. Phosphorus acid
• B. Metaphosphorus acid
• C. Ortho-phosphoric acid
• D. Ortho-phosphoric acid and phosphine

Answer 1

Answer: (D)

Ortho-phosphoric acid and phosphine

Answer 2

{P_4O_6 +\underset{\mathrm{hot}}{ {6H_2O}} -> 3H_3PO_4 + PH_3 }.