AP EAMCET2013ChemistryCoordination Compounds
Which one of the following gives Prussian blue colour?
Options
- AFe ₂ [ Fe ( CN )₆ ]
- BNa ₄ [ Fe ( CN )₆ ]
- CFe ₃ [ Fe ( CN )₆ ]₃
- 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