Question

The oxidation state of ${P}$ in ${H_3PO_3}$ is

• A. 1
• B. 3
• C. -3
• D. 5

Answer 1

Answer: (B)

3

Answer 2

Let oxidation state of P be $x$. $\therefore \:\: 3 + x + 3 (-2) = 0 \Rightarrow x = + 3$