Question

What is the oxidation number of oxygen in oxide, peroxide and superoxide?

Answer 1

Oxide $O^{-2}$ Oxidation No. $=-2$

Peroxide $O_2^{2-}$ Oxidation No. $=\frac{-2}{2}=-1$

Superoxide $O_2^{-1}$ Oxidation No. $=\frac{-1}{2}$