JEE Main 2025 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 7 April 2025, Shift 1, Chemistry Q59

Question 59 of 75 in this shift, Chemistry question 9 of 25, Section A.

The number of valence electrons present in the metal among Cr, Co, Fe and Ni which has the lowest enthalpy of atomisation is

(1) $8$
(2) $9$
(3) $6$ Official answer
(4) $10$

Official answer

Option 3

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

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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.