For the complex ion `[Fe(CN)_(6)]^(3-)`, state :
(i) the type of hybridisation.
(ii) the magnetic behaviour.
(iii) the oxidation number of the central metal atom.

Explanation

For the complex `[Fe(CN)_(6)]^(3-)`
(i) The hybridisation is `d^(2)sp^(3)`.
Electronic configuration of `d^(2)sp^(3)` hybridised orbitals (as `CN^(-)` is a strong ligand) of `Fe^(3+)`, with six pairs of clectrons from six `CN^(-)` groups in `[Fe(CN)_(6)]^(3-)`

(ii) As there are 5 unpaired electrons, the `[Fe(CN)_(6)]^(3-)` compound is paramagnetic.
(iii) Oxidation state of iron is + 3 `(Fe^(+3))`.