JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 28 July 2022, Shift 1, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

The disproportionation of

\mathrm{MnO_4^{2-}}

in acidic medium resulted in the formation of two manganese compounds A and B. If the oxidation state of Mn in B is smaller than that of A, then the spin-only magnetic moment (

\mu

) value of B in BM is __________. (Nearest integer)

Official answer

NTA final key (2022 Session 2).

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Disproportionation of Manganate

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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.