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JEE Main 202524 JanuaryMorning Shift

Exam: JEE Main
Year: 2025
Date: 24 January
Shift: Morning Shift
Subject: Chemistry
Chapter: d and f Block Elements

JEE Main 2025 · 24 January · Morning Shift · Chemistry · d and f Block Elements

Preparation of potassium permanganate from MnO_2 involves two step...

Preparation of potassium permanganate from

\mathrm{MnO}_2

involves two step process in which the 1st step is a reaction with KOH and

\mathrm{KNO}_3

to produce

Options

A $\mathrm{K}_3 \mathrm{MnO}_4$
B $\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{OH})_6\right]$
C $\mathrm{KMnO}_4$
D $\mathrm{K}_2 \mathrm{MnO}_4$

Correct answer

D. $\mathrm{K}_2 \mathrm{MnO}_4$

Step-by-step solution

Preparation of

\mathrm{KMnO}{ }_4 \mathrm{MnO}_2

\xrightarrow[

\mathrm{KNO}_3]{\mathrm{KOH} } \mathrm{K}_2 \mathrm{MnO}_4

\xrightarrow[\substack{

\text{ Oxidation in } \\ \text{ Alkaline solution } }]{

\text{ Elecrolta }

}

\mathrm{KMnO}_4

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