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`K_(4)[Fe(CN)_(6)]` is used for detection ofA. `Fe^(+)` ionsB. `Fe^(3+)` ionsC. `Zn^(2+)` ionsD. `Cu^(2+)` ions.

Answer» Correct Answer - B::C::D
`K_(4)[Fe(CN)_(6)]` or potassium ferrocyanide gives dark bluk colouration with `Fe^(3+)` ions , with `Cu^(2+)` ions `Zn^(2+)` ions and reddish brown ppt. with `Cu^(2+)` ions.


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