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Friday, 9 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 9 April 2024, Shift 2, Chemistry Q86

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

A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation enthalpy. The spin-only magnetic moment value of M+\mathrm{M^{+}} ion is ________ BM (Near integer) (Given atomic number Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)

Official answer

6

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Ionization Enthalpy Irregularities

Same idea in other shifts

Asked 3× in all
  1. 6 Apr 2026, Shift 2 · Q60The correct order of first (ΔiH1\Delta_iH_1) and second (ΔiH2\Delta_iH_2) ionisation enthalpy values of Cr and Mn are : A. ΔiH1\Delta_iH_1 : Cr…MediumOther
  2. 8 Jan 2020, Shift 1 · Q36The third ionization enthalpy is minimum for :MediumSingle correct

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.