Which of the following statement(s) is/are correct ?

Options

A. `[Co(NH_(3))_(6)]^(3+), [Co(CN)_(6)]^(3-)" and "[Co(NO_(2))_(6)]^(3-)` are diamagnetic involving `d^(2)sp^(3)` hybridization.
B. `[Zn(NH_(3))_(4)]^(2+), [FeCl_(4)]^(-)" and "[Ni(CO)_(4)]` are diamagnetic involving `sp^(3)` hybridisation.
C. The magnetic moment of `[Fe(H_(2)O)_(6)]^(3+)` is 5.92 BM. and that of `[Fe(CN)_(6)]^(3-)` is 1.73 B.M.
D. The magnetic moment of `K_(4)[MnF_(6)]" and "K_(3)[FeF_(6)]` are same.

Answer

A, C, D

Explanation

(a) All are `d^(6)` (low spin)
(b) `[FeCl_(4)]^(-)` is paramagnetic
(c )`[Fe(H_(2)O)_(6)]^(3+) d^(5)` (high spin)
`[Fe(CN)_(6)]^(3-) d^(5)` (low spin)
(d) Both are `d^(5)` (low spin)