JEE Main 2020ChemistryAldehydes and KetonesMediumMCQ

JEE Main 2020 — Aldehydes and Ketones Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question

The correct order of the calculated spin-only magnetic moments of complexes A to D is:
A NiCO4
B NiH2O6Cl2
C Na2NiCN4
D PdCl2PPh32

Choose an option

Show full solutionCorrect option: D
Correct answer
DA≈C≈D<B

Step-by-step explanation

PdPPh32Cl2,Pd2+=4d8,M=0
NiCO4,Ni=3d84s2SFL,M=0
NiCN42- Ni2+=3d8SFL M=0
NiH2O62+ Ni2+=3d8WFL t2g2, 2, 2,eg1, 1 So, unpaired electron is 2,M=8BM

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About this question

This is a previous-year question from JEE Main 2020, covering the Aldehydes and Ketones chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.