1.

The wavelengths of light absorbed by the complexes [Ni(H_2O)_6]^(2+),[Ni(en)_3]^(2+),[Ni(H_2O)_4en]^(2+) are lamda_1, lamda_2,lamda_3 respectively. The correct order of wavelengths is

Answer»

`lamda_1 gt lamda_2 gt lamda_3`
`lamda_3 gt lamda_2 gt lamda_1`
`lamda_1 gtlamda_3 gt lamda_2`
`lamda_2 gt lamda_3 lt lamda_1`

Solution :The wavelength of the light absorbed by the complexes `prop1/(streng th of ligands)`
strength of ligand is EN `gt H_2O`.
Hence, energy absorbed WOULD be in order of `[NI(en)_3]^(2+) gt [Ni (H_2O)_4en]^(2+) gt [Ni (H_2O)_6]^(2+)`
Hence, wavelength order would be
`[Ni(H_2O)_6]^(2+) gt [Ni(H_2O)_4 en)]^(2+) gt [Ni (en)_3]^(2+)`
`(lamda_1) (lamda_2) (lamda_3)`
Hence, `(lamda_1 gt lamda_3 gt lamda_2)`.


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