Question

The oxidation state of $K$ in $K{O}_2$ is

• A. $-1$
• B. $+1$
• C. $0$
• D. $+2$

Answer 1

Answer: (B)

The oxidation number of oxygen in superoxide ion $(O_2^{-})$ is $-1$ ; since the compound is neutral, therefore, the oxidation state of potassium is $+1$.