JEE Main 2020ChemistryCoordination CompoundsCrystal Field Theory CftmediumMCQ

JEE Main 2020 — Coordination Compounds Question with Solution

From: JEE Main 2020 (Online) 3rd September Evening Slot

Question

The d-electron configuration of [Ru(en)3 ]Cl2
and [Fe(H2O)6]Cl2 , respectively are :

Choose an option

Show full solutionCorrect option: C
Correct answer
C and

Step-by-step explanation

[Ru(en)3 ]Cl2 :

Here CN = 6 so octahedral splitting happens.

'en' is strong field ligand so 0 > P(pairing energy). That is why pairing of electrons happens.

0 = Energy gap between eg and t2g orbital.
JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Coordination Compounds Question 221 English Explanation 1

[Fe(H2O)6]Cl2 :

Here CN = 6 so octahedral splitting happens.

H2O is weak field ligand so 0 < P(pairing energy). That is why no pairing of electrons happens.

0 = Energy gap between eg and t2g orbital. JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Coordination Compounds Question 221 English Explanation 2

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About this question

This is a previous-year question from JEE Main 2020, covering the Coordination Compounds 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.