Question

H3 po 2 is a stronger reducing agent than h 3 po 3 why

Answer 1

In H3PO2, the structure is one P double Bond O and 1 OH bond with P and 2 directly P-H bonds.

In H3PO3 , the structure is one P double Bond O and 2 OH bonds with P and 1 directly P-H bond.

These direct P-H bonds give nascent H and act as reducing agents.

H3PO2 has more P-H bonds than H3PO3 so it is a better reducing agent.