1.

Which one of the following ionic species will impart colour to an aqueous solution ?A. `Ti^(+4)`B. `Cu^(+)`C. `Zn^(+2)`D. `Cr^(+3)`

Answer» Correct Answer - D
`Ti^(4)=[Ar]4s^(0)3d^(0)(0" unpaired "e^(-))`
`Cu^(+)=[Ar]4s^(0)3d^(10)(0" unpaired "e^(-))`
`Zn^(+2)=[Ar]4s^(0)3d^(10)(0" unpaired "e^(-))`
`Cr^(+3)=[Ar]4s^(0)3d^(3)(3" unpaired "e^(-))`


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