MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryCoordination compoundsValence Bond Theory

[Sc(H2O)6]3+ ion is

A.colourless and diamagnetic✓ Correct

B.coloured and octahedral

C.colourless and paramagnetic

D.coloured and paramagnetic

Explanation

[Sc(H2O)6]3+ is colorless because it cannot undergo d-d transition as it does not have unpaired electron. d-d transition is required for absorption and release of energy which results in giving different colors to the complex. Hence, the correct option is (a).

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