When KO₂ Is Dissolved in Water the Evolution of Oxygen

question 22

Multiple Choice

When KO₂ is dissolved in water the evolution of oxygen takes place according to the reaction
2 KO₂(s) + H₂O(l) → O₂(g) + 2 K⁺(aq) + HO₂^-(aq) + OH^-(aq) .In this reaction the O₂^- ion undergoes

• A)disproportionation.
• B)isomerization.
• C)only oxidation.
• D)only reduction.

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