(A) The compound $KO_{2}$ is a superoxide,where the superoxide ion is $O_{2}^{-}$.Since the overall compound $KO_{2}$ is neutral,the sum of oxidation

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(A) The compound $KO_{2}$ is a superoxide,where the superoxide ion is $O_{2}^{-}$.Since the overall compound $KO_{2}$ is neutral,the sum of oxidation states must be zero.Let the oxidation state of $K$ be $x$.$x + 2(-0.5) = 0$ or $x + (-1) = 0$.Therefore,$x = +1$.