Learn

Friday, 9 October

JEE Main Chemistry · Coordination Compounds

Color and d-d Transitions

Color and d-d Transitions (Coordination Compounds) was asked 3 times in 3 JEE Main shifts, 2021–2025, out of the 42 shifts Lumi analysed. 2 of the 3 had a numerical answer.

Times asked
3
in 3 shifts
Years
2021–2025
Usual format
Numerical value
Application
Pattern
Comes in cycles
repeats across shifts

How it is asked

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

Difficulty

Easy 1Medium 2Hard 0

Where it sits

Chapter: Coordination Compounds. Topic: Crystal Field Theory, 40 questions over 9 ideas.

Other repeat ideas in this topic

Every time it came

All 3 questions

Newest first, each with its options and 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. 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
  3. 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