JEE Main 2019 — Coordination Compounds Question with Solution
From: JEE Main 2019 (Online) 12th January Morning Slot
Question
The pair of metal ions that can give a spin only magnetic moment of 3.9 BM for the complex [M(H2O)6]Cl2, is -
Choose an option
Show full solutionCorrect option: B
Correct answer
BV2+ and Co2+
Step-by-step explanation
Magnetic moment = BM
= 3.9
n = 3
no. of unpaired electron = 3
H2O is weak field ligand so no pairing of electrons happens.
Fe2+ = t2g4eg2
Co2+ = t2g5eg2
V2+ = t2g3eg0
M is V, Co.
= 3.9
n = 3
no. of unpaired electron = 3
H2O is weak field ligand so no pairing of electrons happens.
Fe2+ = t2g4eg2
Co2+ = t2g5eg2
V2+ = t2g3eg0
M is V, Co.
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