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  4. If KMnO4 is reduced by oxalic acid in an acidic medium, then oxidation number of Mn changes from

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Q. If $KMnO_4$ is reduced by oxalic acid in an acidic medium, then oxidation number of $Mn$ changes from

The d-and f-Block Elements

Solution:

In acidic medium,
$\overset{+7}{MnO_4^-} + 8H^+ + 5e^- \rightarrow Mn^{2+} + 4H_2O$