Question

The normal oxide contains______ ion, peroxide contains _______ ion and superoxide contains _______ ion.

• A. $O^{2-}$, $O^{2-}_{2}$, $O^{-}_{2}$
• B. $O^{2-}$, $O^{-}_{2}$, $O^{2-}_{2}$
• C. $O^{-}$, $O^{2-}$, $O^{3-}$
• D. $O^{-}$, $O^{2-}$, $O^{2-}_{2}$

Answer 1

Answer: (A)

$O^{2-}$, $O^{2-}_{2}$, $O^{-}_{2}$

Answer 2

the normal oxides contain $O ^{2-}$ while peroxide contains $O _{2}^{2-}$ ion and superoxide contain $O _{2}^{-}$ions. In normal oxides, the oxygen has oxidation number $-2$ while in peroxide each oxygen have oxidation number of $-1$ and in superoxide the oxidation number of oxygen is $\frac{-1}{2}$.