The correct order of the complexes [Co(NH3)5(H2O)]3+ (A), [Co(NH3)6]3 (B), [Co(CN)6]3– (C) and [CoCl(NH3)5]2+ (D) in terms of wavelength of light absorbed is (A) D C B A (B) C B A D (C) C

Question

The correct order of the complexes [Co(NH3)5(H2O)]3+ (A), [Co(NH3)6]3 (B), [Co(CN)6]3– (C) and [CoCl(NH3)5]2+ (D) in terms of wavelength of light absorbed is

(A) D > C > B > A
(B) C > B > A > D
(C) C > B > D > A
(D) D > A > B > C

Prashant Kotian · Accepted Answer

Correct answer: D. Stronger the ligand greater will be splitting so higher will be absorbed light & smaller will be wave length. so correct order of A absorbed is  D > A > B > C.

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