Chemistry · Redox Reactions

JEE Main 2026 — 21 January, Morning Shift — Question 57

$\mathrm{MnO}_{4}^{2-}$ , in acidic medium, disproportionates to :

Option A:
$\mathrm{Mn}_{2} \mathrm{O}_{7}$ and $\mathrm{MnO}_{2}$
Option B:
$\mathrm{MnO}_{4}^{-}$ and MnO
Option C:
$\mathrm{MnO}_{4}^{-}$ and $\mathrm{MnO}_{2}$
Correct
Option D:
$\mathrm{Mn}_{2} \mathrm{O}_{7}$ and MnO

Answer: C

Step-by-step solution

$3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2026
Paper: 21 January, Morning Shift
Subject: Chemistry
Chapter: Redox Reactions
Topic: n-Factor, Redox Titrations, Self Indicator & Miscellaneous Cases

MnO 4 2- , in acidic medium, disproportionates to : | JEE Main 2026 PYQ with Solution · DhiX AI