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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 5 April 2026, Shift 2, Chemistry Q60

Question 60 of 75 in this shift, Chemistry question 10 of 25, Section A.

Given below are two statements : Statement I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation. Statement II : dxy=dxz=dyz<dx2−y2=dz2d_{xy}=d_{xz}=d_{yz}<d_{x^2-y^2}=d_{z^2} and dx2−y2=dz2<dxy=dxz=dyzd_{x^2-y^2}=d_{z^2}<d_{xy}=d_{xz}=d_{yz} are the d-orbital splittings in [Fe(H2O)6]3+\mathrm{[Fe(H_2O)_6]^{3+}} and [Ni(Cl)4]2−\mathrm{[Ni(Cl)_4]^{2-}} complex ions respectively. In the light of the above statements, choose the correct answer from the options given below :
  1. (1)Both Statement I and Statement II are correctOfficial answer
  2. (2)Both Statement I and Statement II are incorrect
  3. (3)Statement I is correct but Statement II is incorrect
  4. (4)Statement I is incorrect but Statement II is correct

Official answer

Option 1

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Enthalpy of Atomization

Same idea in other shifts

Asked 4× in all
  1. 2 Apr 2025, Shift 2 · Q74The spin-only magnetic moment value of Mn+\mathrm{M^{n+}} ion formed among Ni, Zn, Mn and Cu that has the least enthalpy of atomisation is…MediumNumerical value
  2. 3 Apr 2025, Shift 2 · Q73Among, Sc, Mn, Co and Cu, identify the element with highest enthalpy of atomisation. The spin only magnetic moment value of that element…MediumNumerical value
  3. 7 Apr 2025, Shift 1 · Q59The number of valence electrons present in the metal among Cr, Co, Fe and Ni which has the lowest enthalpy of atomisation isMediumSingle 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.