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Predict which of the following will be coloured in aqueous solution?

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Predict which of the following will be coloured in aqueous solution?

Ti3+, V3+, Sc3+, Mn2+, Fe3+, Co2+ and Mnoa

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Ions with incompletely filled d orbitals will be coloured. Due to d-d transition, Ti3+, V3+, Mn2+, Fe3+ and Co2+ are coloured. MnO4- is also coloured due to charge transfer. Only Sc3+ (3d0) is colourie.

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