Co-Ordination Compounds Question 150

Question: What is the magnetic moment of $ K_3

[FeF_6] $ [Orissa JEE 2005]

Options:

A) 5.91 BM

B) 4.89 BM

C) 3.87 BM

D) 6.92 BM

Show Answer

Answer:

Correct Answer: A

Solution:

$ K_3[FeF_6] $

$ F{e^{3+}}=[Ar]3d^{5}4s^{0} $ Number of unpaired electrons = 5 Magnetic moment $ =\sqrt{n(n+2)}=\sqrt{5(5+2)} $

$ =\sqrt{35} $ = 5.91 BM.



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