MHT CET · Chemistry · d and f Block Elements
Which among the following cations produces colourless aqueous solution in their respective oxidation state?
- A \(\mathrm{Ti}^{3+}\)
- B \(\mathrm{V}^{3+}\)
- C \(\mathrm{Sc}^{3+}\)
- D \(\mathrm{Cu}^{2+}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Sc}^{3+}\)
Step-by-step Solution
Detailed explanation
Condensed electronic configuration of: \(\mathrm{Sc}^{3+}\) : [Ar] \(3 \mathrm{~d}^0 . \mathrm{Sc}^{3+}\) ion has completely empty \(3 \mathrm{~d}-\) orbital, i.e., no unpaired electrons are present. As d-d transitions are not possible, \(\mathrm{Sc}^{3+}\) ion is colourless.
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