JEE Main 2019ChemistryCoordination CompoundsCrystal Field Theory CfthardMCQ

JEE Main 2019 — Coordination Compounds Question with Solution

From: JEE Main 2019 (Online) 12th April Morning Slot

Question

The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is : JEE Main 2019 (Online) 12th April Morning Slot Chemistry - Coordination Compounds Question 244 English

This question includes a diagram. The text above accompanies the figure.

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Show full solutionCorrect option: A
Correct answer
A[Fe(phen)3]2+

Step-by-step explanation

[Fe(phen)3]2+ [Fe(phen)3]3+

Here for Fe+2(3d6) :

CFSE = (-0.4 4 + 0.6 2)0

           = -0.40

for Fe+3(3d5) :

CFSE = (-0.4 3 + 0.6 2)0

           = 0

Here crystal field stabilization energy(CFSE) decreses.

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About this question

This is a previous-year question from JEE Main 2019, 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.