Question

Incorrect statement for pyrophosphorous acid $H_4{P}_2{O}_5$ is:

• A. It contains $P$ in $+5$ oxidation state
• B. It is di-basic acid
• C. It is strongly reducing in nature
• D. It contains one $P-O-P$ bond

Answer 1

The correct option is A It contains $P$ in $+5$ oxidation state

Pyrophosphorous acid $\left(H_4{P}_2{O}_5\right)$ contains P atom in +3 oxidation state. Hence, the statement (A) is incorrect.