Write the state of hybridization, the shape and the magnetic behaviour of the following complex entities:
(i) `[Cr(NH_(3))_(4) Cl_(2)]Cl`
(ii) `[Co Fe_(6)]^(3-)`
(iii) `K_(2)[Ni(CH)_(4)]`

Explanation

(i) [`Co(NH_(3))_(5) Cl]Cl`
IUPSC name : Petaamincehclorids cobalt (III) Choride 0.5 _ 3 , Cl (III) : `d^(6)` Stereochemistry: Octahedral
Conf , ` t_(2g^(6))`
No. of unpaired electrons, n =0
Magnetic moment=0. digmagnetic
(ii) Complex ion `=[Co F_(6)]^(3-)`
Central metal ion `= Co^(3+)`
Configuration of metal ion = `d^(6)`
Hybridistaion of metal ion = `sp^(3) d^(2)`
(iii) Atomic oribatials of Ni (II) ion

As there are no unpaired electrons, the `[Ni(CN)^(4)]^(2-)` ions is diamagnetic .