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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceOtherMediumMulti-step

JEE Main 31 January 2024, Shift 1, Chemistry Q70

Question 70 of 90 in this shift, Chemistry question 10 of 30, Section A.

The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds. C. The hybridization involved in formation of [Ni(CN)4]2−\mathrm{[Ni(CN)_4]^{2-}} complex is dsp2\mathrm{dsp^2}. D. The number of possible isomer(s) of cis-[PtCl2(en)2]2+\mathrm{[PtCl_2(en)_2]^{2+}} is one Choose the correct answer from the options given below:
  1. (1)A, C only
  2. (2)A, D only
  3. (3)B, D only
  4. (4)B, C onlyOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Coordination Compounds
Topic
Crystal Field Theory
Idea tested
Limitations of Crystal Field Theory

Same topic in other shifts

All Crystal Field Theory questions
  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

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