The solution of (B) in conc. HCl on treatment with potassium ferrocyan – InterviewSolution

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1.	The solution of (B) in conc. HCl on treatment with potassium ferrocyanide gives a blue colour or precipitate of compound (D).
Answer» Answer : The ors is chromite `FeOCr_(2)O_(3)`. `underset((B))(Fe_(2)O_(3))+6HCl rarr 2FeCl_(3)+3H_(2)O` `4FeCl_(3)+4K_(4)Fe(CN)_(6)underset("(D) PRUSSIAN blue")(rarr) Fe[Fe(CN)_(6)]_(3)+12 KCl`

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