JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 6 April 2024, Shift 1, Chemistry Q71

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

Consider the following complexes

\mathrm{[CoCl(NH_3)_5]^{2+}}

\mathrm{[Co(CN)_6]^{3-}}

\mathrm{[Co(NH_3)_5(H_2O)]^{3+}}

\mathrm{[Cu(H_2O)_4]^{2+}}

(A) (B) (C) (D) The correct order of A, B, C and D in terms of wavenumber of light absorbed is :

(1)D < A < C < BOfficial answer
(2)B < C < A < D
(3)C < D < A < B
(4)A < C < B < D

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

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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.