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MHT CET202314 May 2023Morning ShiftChemistryd and f Block ElementsActual

Which among the following cations produces colourless aqueous solution in their respective oxidation state?

Options

  1. ATi ³⁺
  2. BV ³⁺
  3. CSc ³⁺
  4. DCu ²⁺

Correct answer

C. Sc ³⁺

Step-by-step solution

Condensed electronic configuration of: Sc ³⁺ : [Ar] 3 ~d ^0 . Sc ³⁺ ion has completely empty 3 ~d - orbital, i.e., no unpaired electrons are present. As d-d transitions are not possible, Sc ³⁺ ion is colourless.

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