See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

A complex having strong field ligand has tendency to absorb light of highest energy. Among the three complexes [Co(NH3)6]+3 will absorb radiation of highest energy and least wavelength. [Co(NH3)5H2O]3+ has field weaker than the above compound and therefore absorb radiation of lesser energy and more wavelength. [CoCl(NH3)5]2+ has the weakest field and therefore will absorb light of least energy and highest wavelength. Strength of ligand NH3 > H2O > Cl. AITS-FT-I-PCM(Sol.)-JEE(Main)/2023 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 10