`[AG(NH_(3))_(2)]^(+)` is linear with sp hybridisation `Ag^(+)` ions `NiCl_(4)^(2-),CrO_(4)^(2-)` annd `MnO_(4)^(-)` have tetrahedral geometry `[Cu(NH_(3))_(4)]^(2+),[[Pt(NH_(3))_(4)]^(2+) and [Ni(CN)_(4)]^(2-)` have `dsp^(2)` hybridisation of the metal ion `FE(CO)_(5)` has trigonal bipyramidal structure with `d_(z^(2))sp^(3)` hybridised ion