Among the following complexes : `K_(3)[Fe(CN)_(6)],[Co(NH_(3))_(6)]Cl_(3)` , `Na_(3)[Co ( o x )_(3)],[Ni(H_(2)O)_(6)]Cl_(2)`, `K_(2)[Pt(CN)_(4)]` and `[Zn(H_(2)O)_(6)(NO_(3))_(2)]`
The diamagnetic are .

Options

A. K, L, M, N
B. K, M, O, P
C. L, M, O, P
D. L, M, N, O

Answer

C

Explanation

K : `K_(3)[Fe(CN)_(6)],Fe^(3+)=3d^(5), d^(2)sp^(3)` hybridization, number of unpaired electrons = 1, paramagnetic.
L : `[Co(NH_(3))_(6)]Cl_(3), Co^(3+)=3d^(6), d^(2)sp^(3)` hybridization, number of unpaired electrons = 0, diamagnetic.