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AP EAMCET2013ChemistryCoordination Compounds

Which one of the following gives Prussian blue colour?

Options

  1. AFe ₂ [ Fe ( CN )₆ ]
  2. BNa ₄ [ Fe ( CN )₆ ]
  3. CFe ₃ [ Fe ( CN )₆ ]₃
  4. DFe ₄ [ Fe ( CN )₆ ]₃

Correct answer

D. Fe ₄ [ Fe ( CN )₆ ]₃

Step-by-step solution

Ferric salts (such as FeCl ₃ ) form Prussian blue (blue ppt or colouration) with potassium ferrocyanide. array r 4 FeCl ₃+3 ~K ₄ [ Fe ( CN )₆ ] Prussian blue (ferric ferrocyanide) Fe ₄ [ Fe ( CN )₆ ]₃ +12 KCl array

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