1.

Wavelength of red light is absorbed by the complex

Answer»

`[Cu(CN)_(4)]^(2-)`
`[Cu(NH_(3))_(4)]^(2=0`
`CuSO_(4)`
`Cu(CN)_(2)`

Solution :When `NH_(4)OH` is added to the solution containing `Cu^(2+)` ions, DEEP blue solution is obtained.
`Cu^(2+)+4NH_(4)OH to underset("deep blue solutio")([Cu(NH_(3))_(4)]^(2+))+4H_(2)O`
HYDRATED cupric compounds absorb RADIATIONS corresponding to red light and the transmitted colour is greenish blue (which is complementary to red colour). THUS, cupric compounds give greenish-blue colour.


Discussion

No Comment Found

Related InterviewSolutions