Question

${\text{O}}_2^{2-}$ is the symbol of...... ion.

• A. oxide
• B. super oxide
• C. peroxide
• D. monoxide

Answer 1

Answer: (C)

The symbol $O^{2-}$ is known as oxide ion. The symbol $O_2^{-}$ is known as super oxide because its oxidation state is $-\frac{1}{2}.$ The symbol $O_2^{2-}$ is known as peroxide ion because oxidation state of oxygen in ${\text{O}}_2^{2-}$ is $-1.$