JEE Main 2019 Chemistry question
Three complexes, [CoCl(NH)] (I), [Co(NH)HO] (II) and [Co(NH)] (III) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is:
Answer: (C)
Solution
Field strength Cl < HO < NH ⇒ Δ increases I < II < III ⇒ λ absorbed decreases.