1.

In which of the following ions , the colouris not due to d-d transition ?

Answer»

`Ti(H_(2)O)_(6)^(3+)`
`CoF_(6)^(3+)`
`CrO_(4)^(2-)`
`[Cu(NH_(3))_(4)]^(2+)`

Solution :In `CrO_(4)^(2-)`, Cr is in `+6` oxidationstate.It has `d^(0)` configuration .The coloure is DUETO charge transferand not DUE to d-d transition


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