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JEE Main 2025 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 4 April 2025, Shift 2, Chemistry Q61

Question 61 of 75 in this shift, Chemistry question 11 of 25, Section A.

The incorrect relationship in the following pairs in relation to ionisation enthalpies is :

(1) $\mathrm{Mn^+<Cr^+}$
(2) $\mathrm{Mn^{2+}<Fe^{2+}}$ Official answer
(3) $\mathrm{Fe^{2+}<Fe^{3+}}$
(4) $\mathrm{Mn^+<Mn^{2+}}$

Official answer

Option 2

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 2× in all

2 Apr 2026, Shift 2 · Q60Given below are two statements: Statement I: Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is highest…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.