Multiple choice

The colour of ____________ is not due to d-d transition.

  1. CrO42-

  2. [Ti(H2O)6]3+

  3. [CoCl4]2-

  4. [Cu(NH3)4]2+

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because the colour is observed due LMCT spectra. In CrO42-, electrons transfer by oxygen to the vacant orbital of Cr6+ ion. A little transition spectra is observed.

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