Question

For $H_{3}P{O}_3$ and $H_{3}P{O}_4$ the correct choice is :

• A. $H_{3}P{O}_3$ is dibasic and reducing agent.
• B. $H_{3}P{O}_3$ is diabasic and non-reducing agent.
• C. $H_{3}P{O}_4$ is tribasic and reducing agent.
• D. $H_{3}P{O}_3$ is tribasic and non-reducing agent.

Answer 1

The correct option is A $H_{3}P{O}_3$ is dibasic and reducing agent.

Only option A is correct. $H_{3}P{O}_3$ is dibasic and reducing agent. Hydrogen bonded to phosphorous atom does not contribute in acidity. Only $O-H$ bond gives $H^{+}$ ions.