Answer
$H_{2}O_{2}(aq) + ClO_{2}(aq) + 2OH^{-}(aq) → O_{2}(g) + 2ClO_{2}^{-} (aq) + 2H_{2}O(l)$
Work Step by Step
Since this is in basic medium, we add OH- ion to the left hand side and water to the right hand side of the equation
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