Q3 / 110 · VITEEE 2023 · Chemistry

An aqueous solution of \(\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) ion has a mild violet colour of low intensity. Which of the following statements is incorrect?

  • A
    The ion absorbs visible light in the region of \(\sim 5000 Å\).
  • B
    The colour results from an electronic transition of one electron from the \(t_{2 g}\) to an \(\mathrm{e}_{\mathrm{g}}\) orbital ?
  • C
    The low colour-intensity is because of a low probability of transition.
  • Correct answer
    D
    The transition is the result of metal-ligand back bonding.

Solution

\(\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6^{3+}\) has one unpaired electron in its d-subshell which gives rise to d-d transition to impart colour.

Hence, the correct answer is option: 'D'.

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