Question

The pair in which phosphorous atoms have a forms have a formal oxidation state of +3 is:

• A. Pyrophosporous and hypophosphoric acids
• B. Orthophsphorus and pyrophosporus acids
• C. Pyrophosporous and hypophosphoric acids
• D. Orthophsphorus and hypophosphoric acids

Answer 1

The correct option is B Orthophsphorus and pyrophosporus acids

Orhophosphorous acid $\left(H_{3}P{O}_3\right)$ - $P=6-3=3$
Pyrophosphorous acid $\left(H_4{P}_2{O}_5\right)$ - $P=(10-4)/2=3$