`[NiCl_(4)]^(2-)` is paramagnetic while `[Ni(CO)_(4)]` is diamagnetic though both are tetrahedral. Why?

Options

A. former is in +2 oxidation state while the latter is in zero oxidation state
B. former has two unpaired electrons while the latter has no uunpaired electron
C. former has three unpaired electrons while the latter has four unpaired electrons
D. Both (a) and (b)

Answer

D

Explanation

Both `[NiCl_(4) ]^(2-)` and `[Ni(CO_(4)]` have tetrahedral geometry but former is paramagnetic while latter is of diamagnetic nature beuase former is in + 2 oxidation state while the latter is in zero oxidation state .And also the former has two unpaired electrons whhile the latter has no uppaired electron .