1.

Correct increasing order for the wavelength of absorption in the visible region for the complexes of Co^(3+)is

Answer»

`[CO(NH_3)_6]^(3+), [Co(en)_3]^(3+) , [Co(H_2O)_6]^(3+)`
`[Co(en)_3]^(3+), [Co(NH_3)_6]^(3+) , [Co(H_2O)_6]^(3+)`
`[Co(H_2O)_6]^(3+) , [Co(en)_3]^(3+), [Co(NH_3)_6]^(3+)`
`[Co(H_2O)_6]^(3+) , [Co(H_2O)_6]^(3+), [Co(en)_3]^(3+)`

ANSWER :B


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