Potassium ozonide contains the ion O3^-. What is the average oxidation number of oxygen in KO3?

JEE Main levelSingle correct optionDifficulty 2 of 3bn024

Potassium ozonide contains the ion $O X_{3} X^{-}$ . What is the average oxidation number of oxygen in $KO X_{3}$ ?

K is

+ 1

, so the three O atoms total

- 1

3 x = - 1

, giving

x = - \frac{1}{3}