Question:
Which of the following transition metal ion is not coloured?
Which of the following transition metal ion is not coloured?
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A transition metal ion is colourless if it has a completely filled or completely empty d-orbital configuration.
Updated On: Jul 1, 2025
- Cu$^+$
- Ni$^{2+}$
- Co$^{2+}$
- V$^{3+}$
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The Correct Option is A
Solution and Explanation
The colour of a transition metal ion arises due to the presence of unpaired electrons in the d-orbitals which allow d-d transitions. Cu$^+$ has an electronic configuration of [Ar] 3d$^{10}$, which has all paired electrons and no possibility of d-d transitions. Therefore, it is colourless.
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