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JEE Main 202310 AprilEvening Shift
Exam
JEE Main
Year
2023
Date
10 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Redox Reactions

JEE Main 2023 · 10 April · Evening Shift · Chemistry · Redox Reactions

In alkaline medium, the reduction of permanganate anion involves a...

In alkaline medium, the reduction of permanganate anion involves a gain of ____________ electrons.

Correct answer

0

Step-by-step solution

In Faintly alkaline medium potassium permanganate changes to manganese dioxide in its oxidising action.

MnO4−+2H2O+3e−→MnO2+4OH−{MnO}_{4}^{-} + 2{H}_{2}O + 3{e}^{-}\overset{}{\to}{MnO}_{2} + 4{OH}^{-}

The oxidation state of manganese in MnO4−{MnO}_{4}^{-} is +7 and in MnO2{MnO}_{2} is +4.

Hence, it transfers 3 electrons during the oxidising action in alkaline medium.

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