(B) Potassium superoxide $(KO_{2})$ reacts with carbon dioxide $(CO_{2})$ to produce potassium carbonate $(K_{2}CO_{3})$ and oxygen gas $(O_{2})$.The

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(B) Potassium superoxide $(KO_{2})$ reacts with carbon dioxide $(CO_{2})$ to produce potassium carbonate $(K_{2}CO_{3})$ and oxygen gas $(O_{2})$.The balanced chemical equation is:$2 KO_{2} + CO_{2} \rightarrow K_{2}CO_{3} + \frac{3}{2} O_{2}$Due to this property,it is used in breathing apparatus for submarines and space travel.