JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 8 January 2020, Shift 1, Chemistry Q37

Question 37 of 75 in this shift, Chemistry question 12 of 25, Section A.

The complex that can show

fac

- and

mer

- isomers is :

(1) $\mathrm{[Co(NH_3)_3(NO_2)_3]}$ Official answer
(2) $\mathrm{[CoCl_2(en)_2]}$
(3) $\mathrm{[Co(NH_3)_4Cl_2]^+}$
(4) $\mathrm{[Pt(NH_3)_2Cl_2]}$

Official answer

Option 1

NTA final key (Jan 2020).

Chapter: Coordination Compounds
Topic: Coordination Isomerism
Idea tested: Facial and Meridional Isomerism in MA3B3

Same idea in other shifts

Asked 3× in all

4 Apr 2025, Shift 2 · Q75A metal complex with a formula $\mathrm{MCl_4\cdot3NH_3}$ is involved in $\mathrm{sp^3d^2}$ hybridisation. It upon reaction with excess of…MediumNumerical value
11 Apr 2023, Shift 1 · Q69Which of the following complex has a possibility to exist as meridional isomer?EasySingle correct

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.