JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 30 January 2024, Shift 2, Chemistry Q69

Question 69 of 90 in this shift, Chemistry question 9 of 30, Section A.

Alkaline oxidative fusion of

\mathrm{MnO_2}

gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

(1) $\mathrm{Mn_2O_3}$ and $\mathrm{MnO_4^{2-}}$
(2) $\mathrm{MnO_4^{2-}}$ and $\mathrm{Mn_2O_7}$
(3) $\mathrm{MnO_4^{2-}}$ and $\mathrm{MnO_4^-}$ Official answer
(4) $\mathrm{Mn_2O_7}$ and $\mathrm{MnO_4^-}$

Official answer

Option 3

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Preparation Steps of Potassium Permanganate

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.