JEE Main 2022 — Electrochemistry Question with Solution
From: JEE Main 2022 (Online) 25th July Evening Shift
Question
The spin-only magnetic moment value of M3+ ion (in gaseous state) from the pairs Cr3+ / Cr2+, Mn3+ / Mn2+, Fe3+ / Fe2+ and Co3+ / Co2+ that has negative standard electrode potential, is ____________ B.M. [Nearest integer]
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Show full solutionCorrect answer: 15
Correct answer
15
Step-by-step explanation
Among the pairs given, has negative reduction potential which is .
(III)
Number of unpaired electrons
B.M.
(III)
Number of unpaired electrons
B.M.
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This is a previous-year question from JEE Main 2022, covering the Electrochemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.