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COMEDK2012Chemistryd and f Block Elements

Which one of the following metal ions is coloured?

Options

  1. ATi ⁺
  2. BCu ⁺
  3. CV ⁴⁺
  4. DZn ²⁺

Correct answer

C. V ⁴⁺

Step-by-step solution

Atomic number of V is 23 . Electronic configuration of V =[ Ar ] 4 s² 3 d³ V ⁴⁺=[A r ] 3 d¹ It contains one unpaired electron, hence it is coloured. While Ti ⁺, Cu ⁺ and Zn ²⁺ do not have unpaired electron.

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