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Saturday, 31 October

JEE Main · Chemistry · Coordination Compounds

Color and d-d Transitions

JEE Main asked Color and d-d Transitions 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2022, 2023, 2024 and 2025. It belongs to Crystal Field Theory, in Coordination Compounds (Chemistry). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
5 of 8
First asked
2021
last in 2025
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.03’210.03’220.07’230.05’240.13’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20251 of 8
  • 20241 of 18
  • 20231 of 12
  • 20221 of 24
  • 20211 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: conceptual.

  • Order/ranking of wavelength absorbed by complexes
  • Splitting energy from absorbed wavelength

Difficulty

Easy 1Medium 4Hard 0

2 of the 5 questions had a numerical answer.

Every question

All 5 questions

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

  1. 3 Apr 2025, Shift 1 · Q63The correct order of the complexes [Co(NH3)5(H2O)]3+\mathrm{[Co(NH_3)_5(H_2O)]^{3+}} (A), [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}} (B), [Co(CN)6]3−\mathrm{[Co(CN)_6]^{3-}}…MediumSingle correct
  2. 1 Feb 2024, Shift 1 · Q69Given below are two statements : Statement (I) : A solution of [Ni(H2O)6]2+\mathrm{[Ni(H_2O)_6]^{2+}} is green in colour. Statement (II) : A…MediumTwo statements
  3. 11 Apr 2023, Shift 2 · Q70Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A :…MediumAssertion–reason
  4. 25 Jul 2022, Shift 1 · Q86Consider the following metal complexes : [Co(NH3)6]3+[\mathrm{Co(NH_3)_6}]^{3+} [CoCl(NH3)5]2+[\mathrm{CoCl(NH_3)_5}]^{2+} [Co(CN)6]3−[\mathrm{Co(CN)_6}]^{3-}…MediumNumerical value
  5. 16 Mar 2021, Shift 2 · Q59[Ti(H2O)6]3+\mathrm{[Ti(H_2O)_6]^{3+}} absorbs light of wavelength 498 nm during a d-d transition. The octahedral splitting energy for the above…EasyNumerical value

Shifts: 16 Mar 2021, Shift 2, 25 Jul 2022, Shift 1, 11 Apr 2023, Shift 2, 1 Feb 2024, Shift 1, 3 Apr 2025, Shift 1.

Same topic

Other ideas in Crystal Field Theory

Crystal Field Theory has 15 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas