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JEE Advanced2008ChemistryCoordination CompoundsActual

Among the following, the coloured compound is

Options

  1. ACuCl
  2. BK ₃ [ Cu ( CN )₄ ]
  3. CCuF ₂
  4. D[ Cu ( CH ₃ CN ₄ ) ] BF ₄

Correct answer

C. CuF ₂

Step-by-step solution

In CuF ₂, Cu ²⁺ ions exist, having d^9 -configuration. Unpaired electron causes colour ( d-d transition) In the crystalline form, CuF ₂ is blue coloured

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