Which is not true about the reaction of $K O_{2}$ with $C O_{2}$ and $H_{2} O$ ?

K O_{2}

, oxidation number of

K

+ 1

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K O_{2}

acts as reductant

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K O_{2}

acts as oxidant

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Oxidation number of carbon does not change during the reaction

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Solution

The correct option is D $K O_{2}$ acts as oxidant
The balanced reaction is as follows:
$4 K O_{2} + 2 H_{2} O + 4 C O_{2} \to 4 K H C O_{3} + 3 O_{2}$
-1/2 +4 +4 0
So, in $K O_{2}$ , oxidation number of $K$ is $+ 1$ and as $O_{2}^{-}$ gets oxidised, here, it acts as reductant.

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