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| 1. |
Predict which of the following will be coloured in aqueous solution ? Ti^(3+),V^(3+),Cu^(+),Sc^(3+),Mn^(2+),Fe^(3+) and Co^(2+). Give reasons for each. |
| Answer» SOLUTION :Only those iions which have incompletely filled d-orbitals are coloured. Those with fully-filled or empty d-orbitals are colourless. Thus, `Ti^(3+),V^(3+),Mn^(2+),Fe^(3+)` and `Co^(2+)` are all coloured DUE to d-d TRANSITION. `MnO_(4)^(-)` is also colouredbut due to charge transfer. Only `Sc^(3+)(3d^(0))` is colourless. | |