\([IrF_3 (H_2O)_2(NH_3)] \); Hyb. \(:\) \(d^2sp^3;\) exhibits geometrical isomerism but does not exhibit optical isomerism.
\([NiCl_2(en)_2]\) ; Hyb. \(:\) \(sp^3d^2;\) exhibits both geometrical isomerism and optical isomerism.
\([Co(CN)_2(ox)_2]^{3-}\) ; Hyb. \(: d^2sp^3 ;\) exhibits both geometrical isomerism and optical isomerism.
(નોંધ : યુગ્મીકરણ ઊર્જા અવગણો)
$5 {Fe}^{2+}+{MnO}_{4}^{-}+8 {H}^{+} \rightarrow {Mn}^{2+}+4 {H}_{2} {O}+5 {Fe}^{3+}$