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NEETChemistryCoordination Compounds

Why do [Fe(CN) 6 ] 4– and [Fe(H 2 O) 6 ] 2+ have different colours in dilute solutions?

Options

  1. AThe colour of a coordination compound depends on CFSE, CN − is a strong field ligand having a higher CFSE valu
  2. B[Fe(CN) 6 ] 4– appears green, while [Fe(H 2 O) 6 ] 2+ appears yellow due to differences in ligand field splitt
  3. CBoth [Fe(CN) 6 ] 4– and [Fe(H 2 O) 6 ] 2+ appear colourless in dilute solutions.
  4. DThe colour difference is due to differences in the coordination number of the iron ion.

Correct answer

A. The colour of a coordination compound depends on CFSE, CN − is a strong field ligand having a higher CFSE valu

Step-by-step solution

Correct Option is : (A) The colour of a coordination compound depends on CFSE, CN − is a strong field ligand having a higher CFSE value as compared to the CFSE value of water.

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