Chemistry - Solid State Question with Solution | TestHub

The increasing order for the wavelengths of absorption in the visible region for the complexes of$\mathrm{C}{\mathrm{o}}^{3+}$is$\left[\mathrm{C}\mathrm{o}\right(\mathrm{e}\mathrm{n}{)}_3{]}^{3+}<\left[\mathrm{C}\mathrm{o}\right(\mathrm{N}{\mathrm{H}}_3)6{]}^{3+}<[\mathrm{C}\mathrm{o}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$.
The decreasing order of ligands strength is$\mathrm{e}\mathrm{n}>\mathrm{N}{\mathrm{H}}_3>{\mathrm{H}}_2\mathrm{O}$. Strong ligand causes greater splitting between two energy levels.
The energy of light absorbed is more and the wavelength of light absorbed is less for the strong ligand.