JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2024, Shift 2, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

Among

\mathrm{VO_2^+}

\mathrm{MnO_4^-}

and

\mathrm{Cr_2O_7^{2-}}

, the spin-only magnetic moment value of the species with least oxidising ability is ________ BM (Nearest integer). (Given atomic member V

=23

, Mn

=25

, Cr

=24

)

Official answer

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Spin-only Magnetism

Same idea in other shifts

Asked 6× in all

2 Apr 2026, Shift 2 · Q74Number of paramagnetic ions among the following d- and f-block metal ions is __________.…MediumNumerical value
4 Apr 2026, Shift 2 · Q62Consider $|x|$ is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with $|x|$ …MediumOther
3 Apr 2025, Shift 1 · Q62The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are : A. $\mathrm{Cr^{2+}}$ B. $\mathrm{Fe^{2+}}$ C.…EasyOther
8 Apr 2025, Shift 2 · Q58The correct decreasing order of spin only magnetic moment values (BM) of $\mathrm{Cu^+}$ , $\mathrm{Cu^{2+}}$ , $\mathrm{Cr^{2+}}$ and…EasySingle correct
8 Apr 2024, Shift 1 · Q86The 'spin only' magnetic moment value of $\mathrm{MO_4^{2-}}$ is ____________ BM. (Where M is a metal having least metallic radii. among…MediumNumerical value

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.