Question

The oxoacid of phosphorus having the strongest reducing property is:

• A. $H_{3}P{O}_3$
• B. $H_{3}P{O}_2$
• C. $H_{3}P{O}_4$
• D. $H_4{P}_2{O}_7$

Answer 1

The correct option is B $H_{3}P{O}_2$

The oxoacid of phosphorus with the highest number of $P-H$ bond will be the strongest reducing agent.

Here $H_{3}P{O}_2$ contain two $P-H$ bond which highest among all the given oxoacids of phosphorus.

Thus $H_{3}PO-2$ is the strongest reducing agent among the given oxoacids of phosphorus.