1.

Which of the following compounds is not coloured ?A. `Na2[CuCl_(4)]`B. `Na_(2)[CdCl_(4)]`C. `K_(4)[Fe(Cl)_(6)]`D. `K_(3)[Fe(CN)_(6)]`

Answer» Correct Answer - B
`Na_(2)[CdCl_(4)]` is not coloured. This is due to fully filled `4d^(10)` outermost contiguration of `Cd^(2+)` ion


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