JEE Main 2021 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 26 February 2021, Shift 2, Chemistry Q60

Question 60 of 90 in this shift, Chemistry question 30 of 30, Section B.

The number of stereoisomers possible for

[\mathrm{Co(ox)_2(Br)(NH_3)}]^{2-}

is __________. [ox = oxalate]

Official answer

NTA final key.

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

Same idea in other shifts

Asked 3× in all

13 Apr 2023, Shift 2 · Q72The total number of stereoisomers for the complex $[\mathrm{Cr}(ox)_2\mathrm{ClBr}]^{3-}$ (where $ox$ = oxalate) is:MediumSingle correct
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

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.