The reaction $K O_{2} + H_{2} O + C O_{2} ⟶ K H C O_{3} + O_{2}$ is an example of :

intermolecular redox

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intramolecular redox

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disproportionation

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non redox change

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Solution

The correct option is A disproportionation
The balanced reaction is given below:
$4 K O_{2} + 2 H_{2} O + 4 C O_{2} \to 4 K H C O_{3} + 3 O_{2}$
-1/2 +4 +4 -2 0
Here, oxygen oxidises as well as reduces, so, it is a disproportionation reaction.

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