JEE Main 2021 — D And F Block Elements Question with Solution
From: JEE Main 2021 (Online) 17th March Morning Shift
Question
What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution?
Choose an option
Show full solutionCorrect option: D
Correct answer
D5.92
Step-by-step explanation
25Mn = [Ar]3d5 4s2
Mn2+ = [Ar]3d5 4s0
No. of unpaired electron (n) = 5
BM
Mn2+ = [Ar]3d5 4s0
No. of unpaired electron (n) = 5
BM
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the D And F Block Elements chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2021, covering the D And F Block Elements 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.