Correct increasing order for the wavelengths of absorption in the visible region by the complexes of `Co^(3+)` is:A. `[Co(H_(2)O)_(6)]^(3+), [Co(en)_(3)]^(3+), [Co(NH_(3))_(6)]^(3+)`B. `[Co(H_(2)O)_(6)]^(3+), [Co(NH_(3))_(6)]^(3+), [Co(en)_(3)]^(3+)`C. `[Co(H_(2)O)_(6)]^(3+), [Co(en)_(3)]^(3+), [Co(H_(2)O)_(6)]^(3+)`D. `[Co(en)_(3)]^(3+), [Co(NH)_(3))_(6)]^(3+), [Co(H_(2)O)_(6)]^(3+)`

Correct increasing order for the wavelengths of absorption in the visi

1.	Correct increasing order for the wavelengths of absorption in the visible region by the complexes of `Co^(3+)` is:A. `[Co(H_(2)O)_(6)]^(3+), [Co(en)_(3)]^(3+), [Co(NH_(3))_(6)]^(3+)`B. `[Co(H_(2)O)_(6)]^(3+), [Co(NH_(3))_(6)]^(3+), [Co(en)_(3)]^(3+)`C. `[Co(H_(2)O)_(6)]^(3+), [Co(en)_(3)]^(3+), [Co(H_(2)O)_(6)]^(3+)`D. `[Co(en)_(3)]^(3+), [Co(NH)_(3))_(6)]^(3+), [Co(H_(2)O)_(6)]^(3+)`
Answer» Correct Answer - D `Delta E prop` field of ligand strength `prop (1)/(lambda)` correct order of field strength of ligand: `H_(2) O lt NH_(3) lt en`

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