Three complexes (I) [CoCl(NH3)5]+2 (II) [Co(NH3)5 H2O]+2 (III) [Co(NH3)6 ]+3 absorb light in the visible region .The correct order of wavelength of light absorbed by them is

A complex having a strong field ligand has the tendency to absorb light of the highest energy. Among the three complexes, [Co(NH3)6 ]+3 will absorb radiation of the highest energy and least wavelength.[Co(NH3)5H2O]+2 has a weaker field than the above compound and therefore absorbs radiation of lesser energy and more wavelength. [CoCl(NH3)5]+2has the weakest field and therefore will absorb light of least energy and highest wavelength. Strength of ligand: NH3>H2O>Cl-

Three complexes (I) [CoCl(NH3)5]+2 (II) [Co(NH3)5 H2O]+2 (III) [Co(NH3)6 ]+3 absorb light in the visible region .The correct order of wavelength of light absorbed by them is

A complex having a strong field ligand has the tendency to absorb light of the highest energy. Among the three complexes, [Co(NH3)6 ]+3 will absorb radiation of the highest energy and least wavelength.[Co(NH3)5H2O]+2 has a weaker field than the above compound and therefore absorbs radiation of lesser energy and more wavelength. [CoCl(NH3)5]+2has the weakest field and therefore will absorb light of least energy and highest wavelength. Strength of ligand: NH3>H2O>Cl-