Complete and balance the following reactions:
${[M n O_{4}]}^{2 -} + H^{+} ⟶$ A $+ {[M n O_{4}]}^{-} + H_{2} O$ .
Identify the compound $A$ .

M n_{2} O_{2}

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M n O_{4}

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M n O_{2}

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None of these

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Solution

The correct option is C $M n O_{2}$
In acidic medium, following reaction takes place:
$M n O_{4}^{2 -} + H^{+} ➝ M n O_{4}^{-} + M n O_{2}$
Hence, option C is correct

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