JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 13 April 2023, Shift 2, Chemistry Q72

Question 72 of 90 in this shift, Chemistry question 12 of 30, Section A.

The total number of stereoisomers for the complex

[\mathrm{Cr}(ox)_2\mathrm{ClBr}]^{3-}

(where

ox

= oxalate) is:

(1)2
(2)3Official answer
(3)4
(4)1

Official answer

Option 2

NTA final key.

Chapter: Coordination Compounds
Topic: Coordination Isomerism
Idea tested: Total Isomer Calculation

Same idea in other shifts

Asked 3× in all

28 Jun 2022, Shift 2 · Q87(a) $\mathrm{CoCl_3.4\ NH_3}$ , (b) $\mathrm{CoCl_3\cdot5NH_3}$ , (c) $\mathrm{CoCl_3\cdot6NH_3}$ and (d) $\mathrm{CoCl(NO_3)_2\cdot5NH_3}$ .…MediumNumerical value
26 Feb 2021, Shift 2 · Q60The number of stereoisomers possible for $[\mathrm{Co(ox)_2(Br)(NH_3)}]^{2-}$ is __________. [ox = oxalate]HardNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.