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Question
Salt of Sc3+ and Ti4+ are colourless. Explain why?
Solution
- Condensed electronic configurations of Sc3+ and Ti4+ are: Sc3+: [Ar] 3d0 and Ti4+: [Ar] 3d0, respectively.
- The ions Sc3+ and Ti4+ have completely empty d-orbitals i.e., no unpaired electrons are present. Thus, their salts are colourless, as d-d transitions are not possible.
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