Choose the correct statement(s) :

Options

A. `[Co(NH_(3))_(6)]^(2+)` is an inner orbital complex whereas `[Ni(NH_(3))_(6)]^(2+)` is an outer orbital complex
B. `[Fe(H_(2)O)_(6)]^(3+)` is strongly paramagnetic whereas `[Fe(CN)_(6)]^(3-)` is weakly paramagnetic.
C. `[Ni(CO)_(4)]` is tetrahedral and paramagnetic
D. `[NiCl_(4)]^(2-)` is tetrahedral and diamagnetic

Answer

A, B

Explanation

`[Ni(CO)_(4)]` is diamagnetic.
`[NiCl_(4)]^(2-)` is paramagnetic.