NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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Spin only magnetic moment value of

{\left[ {Mn{{\left( {CN} \right)}_6}} \right]^{3 - }}

ion is

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Correct option: A

2.83 BM

Option A (2.83 BM) is correct because

{\left[ {Mn{{\left( {CN} \right)}_6}} \right]^{3 - }}

has a

Mn^{3+}

ion with a

d^4

configuration. Since

CN^-

is a strong field ligand, it will pair up the electrons, resulting in 2 unpaired electrons and a magnetic moment of approximately 2.83 BM.

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