JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumApplication

JEE Main 4 August 2021, Shift 1, Chemistry Q58

Question 58 of 90 in this shift, Chemistry question 28 of 30, Section B.

Sum of unpaired electrons in

\mathrm{[NiCl_4]^{2-}}

and

\mathrm{[Ni(CN)_4]^{2-}}

is ________.

Official answer

NTA final key.

Chapter: Coordination Compounds
Topic: Crystal Field Theory
Idea tested: d8 Square Planar Preference

Same idea in other shifts

Asked 2× in all

28 Jun 2022, Shift 1 · Q69Given below are two statements : Statement I : $\mathrm{[Ni(CN)_4]^{2-}}$ is square planar and diamagnetic complex, with $dsp^2$ …MediumTwo statements

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.