$K O_{2}$ (potassium superoxide) is used in oxygen cylinders in space and submarines because it :

produces ozone

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absorbs

C O_{2}

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absorbs

C O_{2}

and increase

O_{2}

contents

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eliminates moisture

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Solution

The correct option is D absorbs $C O_{2}$ and increase $O_{2}$ contents
$K O_{2}$ (potassium superoxide) is used in oxygen cylinders in space and submarines because it absorbs $C O_{2}$ and increases $O_{2}$ concentration according to the following reaction:

$2 C O_{2} + 4 K O_{2} \to 3 O_{2} + 2 K_{2} C O_{3}$ .

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