Which of the following is/are correct for potassium ferrocyanide?

Options

A. It gives a brown precipitate with `Cu^(2+)` ions
B. It given a white precipitate of mixed salt with `Ca^(2+)` ions
C. It in excess gives a bluish white/white precipitate with `Zn^(2+)`
D. It develops a deep red colouration with `Fe^(3+)`

Answer

A, B, C

Explanation

`Fe_(4)[Fe(CN)_(6)]_(3)` (Prussian blue)