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Saturday, 31 October

JEE Main · Chemistry · The d- and f-Block Elements

Enthalpy of Atomization

JEE Main asked Enthalpy of Atomization 4 times in 4 of the 108 shifts Lumi analysed, in 2025 and 2026. It belongs to d-Block Elements, in The d- and f-Block Elements (Chemistry). The longest wait between two years asking it was 1 year. In 2025 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
2 of 8
First asked
2025
last in 2026
Pattern
New since 2024
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.20.40’170’200’210’220’230’240.38’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 3 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20253 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

  • Statement i/ii on d-block and cft splitting
  • Magnetic moment of selected element

Difficulty

Easy 0Medium 4Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 5 Apr 2026, Shift 2 · Q60Given below are two statements : Statement I : Presence of large number of unpaired electrons in transition metal atoms results in higher…MediumTwo statements
  2. 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
  3. 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
  4. 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

Shifts: 2 Apr 2025, Shift 2, 3 Apr 2025, Shift 2, 7 Apr 2025, Shift 1, 5 Apr 2026, Shift 2.

Same topic

Other ideas in d-Block Elements

d-Block Elements has 31 ideas JEE Main has asked; 21 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas