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JEE Main 202330 JanuaryMorning Shift
Exam
JEE Main
Year
2023
Date
30 January
Shift
Morning Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2023 · 30 January · Morning Shift · Chemistry · d and f Block Elements

The number of electrons involved in the reduction of permanganate...

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

Correct answer

0

Step-by-step solution

Permanganate is reduced to Manganese dioxide by the following reaction:
MnO4−+7+4H++3e−⟶Mn+4O2+2H2O\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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