The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____ .

Question

TestHub · Accepted Answer

Permanganate is reduced to Manganese dioxide by the following reaction:
$\overset{+ 7}{{MnO}_{4}^{-}} + 4 H^{+} + 3 e^{-} ⟶ \overset{+ 4}{Mn} O_{2} + 2 H_{2} O$
Here, oxidation no. of manganese was reduced by 3 from reactant to product side. Thus, three electrons are involved.

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