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NEET 2009 Chemistry question

ChemistryCoordination CompoundsNEET 2009

Out of , , and (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are :

Answer: (2)

Solution

Colour arises from d-d transitions, which require partly filled d orbitals. : Ti is , configuration , no d-d transition, colourless. : Cu is , ,

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Question ID VK-090315