Amongst `Ni(CO)_(4),[Ni(CN)_(4)]^(2-) and NiCl_(4)^(2-)`:

Options

A. `Ni(CO)_4 and [NiCl_4]^(2-) ` are diamagnetic and `[Ni(CN)_4]^(2-) ` is paramagnetic
B. `[NiCl_4]^(2-)` and `[Ni(CN)_4]^(2-)` are diamagnetic and `Ni(CO)_4 ` is paramagnetic
C. `Ni(CO)_4 and [NiCl_4]^(2-) ` are diamagnetic and `[NiCl_4]^(2-)` is paramagnetic
D. `Ni(CO)_4` is diamagnetic and `[NiCl_4]^(2-) and [NI(CN)_4]^(2-)` are paramagnetic

Answer

C

Explanation

The electronic configuration of Ni in

CO and `CN^-` are strong ligands so they induces pairing of electrons so their complexes are diamagnetic while `Cl^-` is a weak ligand so it does not induce the pairing of electrons so its complex is paramagnetic.