MCQ
The color of $\mathrm{Cu}^{+}$ compounds is?
- ✓White
- BBlue
- COrange
- DYellow
✓
Answer
Correct option: A.
White
$\mathrm{Cu}^{+}$ compounds are generally colourless $($white$).$ The electronic configuration is $3 \mathrm{d}^{10} 4 \mathrm{~s}^0.$ So there is no unpaired electron present in the ion. So the electronic transition between two energy levels $\mathrm{t}_{2 \mathrm{~g}}$ and $\mathrm{e}_{\mathrm{g}} ($responsible for the colour of transition metals$)$ is not possible.
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