Question

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

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

Answer 1

Answer: (A)

In the oxyacid structure of phosphorous above, the $P-H$ bond is responsible for reducing properties and $-OH$ groups bonded to phosphorous are responsible for the basicity of the phosphorous oxyacids.
As $H_{3}P{O}_4$ has one $P-H$ bond and $2P-OH$ bonds it can act as a reducing agent and is a dibasic and.