Which one of the followng is square planar in structure and has diamagnetic property ?

Options

A. `[Ni (H_(2)O)_(6)]^(2+)`
B. `[Ni (CO)_(4)]`
C. `[Ni(CN)_(4)]^(2-)`
D. `p[NiCl_(4)]^(2-)`

Answer

C

Explanation

`[Ni(CN)_(4)]^(2-)` have `CN^(-)` as stong field ligand which helps in pairing of electron thus 2 unpaired electrons of nickle are paired up due to which the coordinated ion is diamagnetic with `dsp^(2)` hybridisation and square planar geometry.