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CGP EDU Academic Team
Published on: August 12, 2026
Which of the following ions give colourless aqueous solution?
Text Solution
Verified by ExpertsThe correct answer is:
D
Ni 2+ , Fe 2+ and Cu 2+ has 2, 4 and 1 unpaired electrons respectively. So in presence of ligands d-d transition takes place and these hydrated ions produce colour in aqueous solutions. Cu + is diamagnetic with 3d 10 configuration; so no d-d transition is possible and thus colourless.
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