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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceMatch the listMediumApplication

JEE Main 31 January 2024, Shift 2, Chemistry Q71

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

Match 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. t2g2eg0t_{2g}^{2}e_g^{0} B. [Fe(H2O)6]3+\mathrm{[Fe(H_2O)_6]^{3+}} | II. t2g3eg0t_{2g}^{3}e_g^{0} C. [Ni(H2O)6]2+\mathrm{[Ni(H_2O)_6]^{2+}} | III. t2g3eg2t_{2g}^{3}e_g^{2} D. [V(H2O)6]3+\mathrm{[V(H_2O)_6]^{3+}} | IV. t2g6eg2t_{2g}^{6}e_g^{2} Choose the correct answer from the options given below:
  1. (1)A-II, B-III, C-IV, D-IOfficial answer
  2. (2)A-III, B-II, C-IV, D-I
  3. (3)A-IV, B-I, C-II, D-III
  4. (4)A-IV, B-III, C-I, D-II

Official answer

Option 1

NTA final key.

Chapter
Coordination Compounds
Topic
Crystal Field Theory
Idea tested
High and Low Spin States

Same idea in other shifts

Asked 19× in all
  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 2 Apr 2025, Shift 2 · Q61The type of hybridization and the magnetic property of [MnCl6]3−\mathrm{[MnCl_6]^{3-}} are,MediumSingle correct
  8. 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

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.