Learn

Friday, 9 October

JEE Main Chemistry · Coordination Compounds

Crystal Field Theory in JEE Main

Crystal Field Theory (Chemistry, Coordination Compounds) came 40 times in 31 of the 42 JEE Main shifts Lumi analysed, across 9 distinct ideas. 27 of them came in 2024–26; it was last asked in 2026.

Questions
40
in 31 shifts
Ideas asked
9
5 asked more than once
Numerical answer
11
28% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
06120’174’203’211’225’236’2411’2510’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 12Medium 25Hard 3

Format

  • Single correct12 Q
  • Numerical value11 Q
  • Match the list7 Q
  • Other7 Q
  • Two statements2 Q
  • Assertion–reason1 Q
Ideas inside the topic
9 ideas
Where it sits

Part of Coordination Compounds, which had 80 questions in all. Crystal Field Theory accounts for 50% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Every question

All 40 Crystal Field Theory questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q62Match List - I with List - II. List - I : Chromium (III) Complexes (en = ethylene diamine) List - II : Δ0\Delta_0 (cm−1\mathrm{cm^{-1}}) A.…MediumMatch the list
  2. 4 Apr 2026, Shift 1 · Q62Match the LIST-I with LIST-II List-I (Complex ion): A. [Cr(H2O)6]2+[\mathrm{Cr(H_2O)_6}]^{2+}; B. [Co(H2O)6]2+[\mathrm{Co(H_2O)_6}]^{2+}; C.…EasyMatch the list
  3. 4 Apr 2026, Shift 2 · Q60Consider the metal complexes [Ni(en)3]2+\mathrm{[Ni(en)_3]^{2+}} (A), [NiCl4]2−\mathrm{[NiCl_4]^{2-}} (B) and [Ni(NH3)6]2+\mathrm{[Ni(NH_3)_6]^{2+}} (C). Choose the…MediumSingle correct
  4. 5 Apr 2026, Shift 1 · Q61The correct statements about metal carbonyls are A. The metal-carbon bonds in metal carbonyls possess both σ\sigma and π\pi-character.…MediumOther
  5. 5 Apr 2026, Shift 1 · Q62Given below are two statements: Statement I: Each electron in ege_g orbitals destabilizes the orbitals by +0.6 Δo+0.6\,\Delta_o and each…EasyTwo statements
  6. 5 Apr 2026, Shift 2 · Q71The total number of unpaired electrons present in the d3d^3, d4d^4 (low spin) d5d^5 (high spin), d6d^6 (high spin) and d7d^7 (low spin)…EasyNumerical value
  7. 6 Apr 2026, Shift 1 · Q61Match the LIST-I with LIST-II List-I (Electronic configuration of tetrahedral metal ion) | List-II (Crystal Field Stabilization Energy…MediumMatch the list
  8. 6 Apr 2026, Shift 1 · Q62Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex? A. dxy=dxz>dx2−y2d_{xy}=d_{xz}>d_{x^2-y^2} B.…EasyOther
  9. 6 Apr 2026, Shift 2 · Q61Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ? A.…MediumOther
  10. 8 Apr 2026, Shift 2 · Q71Number of paramagnetic complexes among the following is ________. [MnBr4]2−[\mathrm{MnBr_4}]^{2-}, [NiCl4]2−[\mathrm{NiCl_4}]^{2-},…MediumNumerical value
  11. 2 Apr 2025, Shift 1 · Q60Given below are two statements : Statement (I) : In octahedral complexes, when Δo<\Delta_o< P high spin complexes are formed. When…EasyTwo statements
  12. 2 Apr 2025, Shift 1 · Q74A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential (M3+/M2+\mathrm{M^{3+}/M^{2+}}). It forms a metal…MediumNumerical value
  13. 2 Apr 2025, Shift 2 · Q60The d-orbital electronic configuration of the complex among [Co(en)3]3+\mathrm{[Co(en)_3]^{3+}}, [CoF6]3−\mathrm{[CoF_6]^{3-}},…MediumSingle correct
  14. 2 Apr 2025, Shift 2 · Q61The type of hybridization and the magnetic property of [MnCl6]3−\mathrm{[MnCl_6]^{3-}} are,MediumSingle correct
  15. 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
  16. 3 Apr 2025, Shift 2 · Q62Identify the diamagnetic octahedral complex ions from below ; A. [Mn(CN)6]3−[\mathrm{Mn(CN)_6}]^{3-} B. [Co(NH3)6]3+[\mathrm{Co(NH_3)_6}]^{3+} C.…MediumOther
  17. 4 Apr 2025, Shift 2 · Q60The correct order of [FeF6]3−\mathrm{[FeF_6]^{3-}}, [CoF6]3−\mathrm{[CoF_6]^{3-}}, [Ni(CO)4]\mathrm{[Ni(CO)_4]} and [Ni(CN)4]2−\mathrm{[Ni(CN)_4]^{2-}} complex…MediumSingle correct
  18. 7 Apr 2025, Shift 1 · Q73The number of paramagnetic complexes among [FeF6]3−[\mathrm{FeF_6}]^{3-}, [Fe(CN)6]3−[\mathrm{Fe(CN)_6}]^{3-}, [Mn(CN)6]3−[\mathrm{Mn(CN)_6}]^{3-},…HardNumerical value
  19. 7 Apr 2025, Shift 2 · Q62The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively :…MediumSingle correct
  20. 7 Apr 2025, Shift 2 · Q73The number of paramagnetic metal complex species among [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}}, [Co(C2O4)3]3−\mathrm{[Co(C_2O_4)_3]^{3-}},…HardNumerical value
  21. 8 Apr 2025, Shift 2 · Q60Match the LIST-I with LIST-II LIST-I (Complex/ Species) | LIST-II (Shape & magnetic moment) A. [Ni(CO)4]\mathrm{[Ni(CO)_4]} | I. Tetrahedral, 2.8…MediumMatch the list
  22. 6 Apr 2024, Shift 2 · Q71Match List - I with List - II. List - I (Tetrahedral Complex) (A) TiCl4\mathrm{TiCl_4} (B) [FeO4]2−[\mathrm{FeO_4}]^{2-} (C)…MediumMatch the list
  23. 8 Apr 2024, Shift 1 · Q71Number of Complexes with even number of electrons in t2g\mathrm{t_{2g}} orbitals is - [Fe(H2O)6]2+[\mathrm{Fe(H_2O)_6}]^{2+},…MediumSingle correct
  24. 31 Jan 2024, Shift 1 · Q70The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond…MediumOther
  25. 31 Jan 2024, Shift 1 · Q86The 'Spin only' Magnetic moment for [Ni(NH3)6]2+[\mathrm{Ni(NH_3)_6}]^{2+} is _________ ×10−1\times10^{-1} BM. (given = Atomic number of Ni : 28)EasyNumerical value
  26. 31 Jan 2024, Shift 2 · Q70Select the option with correct property -MediumSingle correct
  27. 31 Jan 2024, Shift 2 · Q71Match List I with List II LIST I (Complex ion) | LIST II (Electronic Configuration) A. [Cr(H2O)6]3+\mathrm{[Cr(H_2O)_6]^{3+}} | I.…MediumMatch the list
  28. 6 Apr 2023, Shift 1 · Q72Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The spin only magnetic…MediumAssertion–reason
  29. 8 Apr 2023, Shift 2 · Q69Match List I with List II LIST I (Coordination Complex): A. [Cr(CN)6]3−[\mathrm{Cr(CN)_6}]^{3-}; B. [Fe(H2O)6]2+[\mathrm{Fe(H_2O)_6}]^{2+}; C.…MediumMatch the list
  30. 8 Apr 2023, Shift 2 · Q90The observed magnetic moment of the complex [Mn(NCS)6]x−[\mathrm{Mn(NCS)_6}]^{x-} is 6.06 BM. The numerical value of xx is ____________.MediumNumerical value
  31. 11 Apr 2023, Shift 1 · Q88The ratio of spin-only magnetic moment values…EasyNumerical value
  32. 13 Apr 2023, Shift 2 · Q70Which of the following complexes will exhibit maximum attraction to an applied magnetic field?EasySingle correct
  33. 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
  34. 25 Jul 2021, Shift 1 · Q39Which one of the following species responds to an external magnetic field ?EasySingle correct
  35. 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
  36. 18 Mar 2021, Shift 1 · Q58The total number of unpaired electrons present in the complex K3[Cr(oxalate)3]\mathrm{K_3[Cr(oxalate)_3]} is __________.EasyNumerical value
  37. 9 Jan 2020, Shift 2 · Q37The correct order of the spin-only magnetic moments of the following complexes is : (I) [Cr(H2O)6]Br2\mathrm{[Cr(H_2O)_6]Br_2} (II)…MediumOther
  38. 2 Sep 2020, Shift 1 · Q36For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements : (I) both the complexes can be high spin. (II)…MediumOther
  39. 2 Sep 2020, Shift 1 · Q37Consider that a d6d^{6} metal ion (M2+\mathrm{M^{2+}}) forms a complex with aqua ligands, and the spin only magnetic moment of the complex…HardSingle correct
  40. 6 Sep 2020, Shift 2 · Q39For a d4\mathrm{d^4} metal ion in an octahedral field, the correct electronic configuration is :EasySingle correct