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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 27 June 2022, Shift 1, Chemistry Q71

Question 71 of 90 in this shift, Chemistry question 11 of 30, Section A.

Which of the following will have maximum stabilization due to crystal field ?
  1. (1)[Ti(H2O)6]3+\mathrm{[Ti(H_2O)_6]^{3+}}
  2. (2)[Co(H2O)6]2+\mathrm{[Co(H_2O)_6]^{2+}}
  3. (3)[Co(CN)6]3−\mathrm{[Co(CN)_6]^{3-}}Official answer
  4. (4)[Cu(NH3)4]2+\mathrm{[Cu(NH_3)_4]^{2+}}

Official answer

Option 3

NTA final key.

Chapter
Coordination Compounds
Topic
Crystal Field Theory
Idea tested
CFSE Calculation

Same idea in other shifts

Asked 11× in all
  1. 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
  2. 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
  3. 10 Apr 2023, Shift 2 · Q70Match List I with List II LIST I (Complex) A. [Ti(H2O)6]2+[\mathrm{Ti(H_2O)_6}]^{2+} B. [V(H2O)6]2+[\mathrm{V(H_2O)_6}]^{2+} C. [Mn(H2O)6]3+[\mathrm{Mn(H_2O)_6}]^{3+}…MediumMatch the list
  4. 12 Apr 2023, Shift 1 · Q72Match List I with List II LIST I (Complex) / LIST II (CFSE (Δo\Delta_o)) A. [Cu(NH3)6]2+\mathrm{[Cu(NH_3)_6]^{2+}} - I. −0.6-0.6 B.…MediumMatch the list
  5. 29 Jul 2022, Shift 1 · Q90[Fe(CN)6]3−\mathrm{[Fe(CN)_6]^{3-}} should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization…MediumNumerical value
  6. 26 Aug 2021, Shift 2 · Q39Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value. Complexes :…MediumSingle correct
  7. 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
  8. 3 Sep 2020, Shift 1 · Q37The electronic spectrum of [Ti(H2O)6]3+\mathrm{[Ti(H_2O)_6]^{3+}} shows a single broad peak with a maximum at 20,300 cm−1\mathrm{cm^{-1}}. The crystal…MediumSingle correct

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 108 of the 174 JEE Main shifts held from 2017 to 2026.