Reduction of the metal centre in aqueous permanganate ion involves :

Engineering

Chemistry

Dichromate and Permanganate Ion Reactions

Question

3 electrons in neutral medium

5 electrons in neutral medium

5 electrons in acidic medium

3 electrons in alkaline medium

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

$\underset{}{\to}$ In alkaline solution, KMnO₄ is first reduced to magnate and then to insoluble MnO₂

_{$\to_{}^{} {\overset{+ 7}{2 KMnO}}_{4} + H_{2} O \overset{Neutral}{\to} {\overset{+ 4}{2 MnO}}_{4} + 2 KOH + 3 [O]$}

$\to_{}^{} {MnO}_{4}^{-} + 8 H^{+} + 5 e^{-} \overset{acidic}{\to} {Mn}^{+ 2} + 4 H_{2} O$