Question

The magnetic moment is measured in Bohr Magneton (BM). 

Spin only magnetic moment of Fe in [Fe(H₂O)₆]³⁺ and [Fe(CN)₆]^3- complexes respectively is 

(1) 6.92 B.M. in both 

(2) 4.89 B.M. and 6.92 B.M. 

(3) 3.87 B.M. and 1.732 B.M. 

(4) 5.92 B.M. and 1.732 B.M

Answer 1

(4) 5.92 B.M. and 1.732 B.M

Pairing occur due to strong field ligand CN^-