JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 4 April 2024, Shift 1, Chemistry Q70

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

The correct sequence of ligands in the order of decreasing field strength is :

(1) $\mathrm{CO} > \mathrm{H_2O} > \mathrm{F^-} > \mathrm{S^{2-}}$ Official answer
(2) $\mathrm{NCS^-} > \mathrm{EDTA^{4-}} > \mathrm{CN^-} > \mathrm{CO}$
(3) $\mathrm{^-OH} > \mathrm{F^-} > \mathrm{NH_3} > \mathrm{CN^-}$
(4) $\mathrm{S^{2-}} > \mathrm{^-OH} > \mathrm{EDTA^{4-}} > \mathrm{CO}$

Official answer

Option 1

NTA final key.

Chapter: Coordination Compounds
Topic: Crystal Field Theory
Idea tested: Spectrochemical Series

Same idea in other shifts

Asked 6× in all

2 Apr 2026, Shift 1 · Q62Match List - I with List - II. List - I : Chromium (III) Complexes (en = ethylene diamine) List - II : $\Delta_0$ ( $\mathrm{cm^{-1}}$ ) A.…MediumMatch the list
5 Apr 2024, Shift 1 · Q70The correct order of ligands arranged in increasing field strength.EasySingle correct
6 Apr 2024, Shift 1 · Q71Consider the following complexes $\mathrm{[CoCl(NH_3)_5]^{2+}}$ , $\mathrm{[Co(CN)_6]^{3-}}$ , $\mathrm{[Co(NH_3)_5(H_2O)]^{3+}}$ ,…MediumSingle correct
25 Jul 2022, Shift 2 · Q71The correct order of energy of absorption for the following metal complexes is A : $\mathrm{[Ni(en)_3]^{2+}}$ , B :…MediumSingle correct
2 Sep 2020, Shift 2 · Q37Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of $\mathrm{M^{n+}}$ ion are provided below; their $\lambda_{\max}$ …MediumDiagram basedHas a figure

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.