Which of the following statement(s) is (are) correct with reference to the ferrous and ferric ions ?

Options

A. `Fe^(3+)` gives brown colour with potassium ferricyanide
B. `Fe^(2+)` gives blue precipitate with potassium ferricyanide
C. `Fe^(3+)` gives red colour with potassium thiocyanate
D. `Fe^(2+)`gives brown colour with ammonium thiocyanate.

Explanation

`K_(3)[Fe(CN)_(6)]` reacts with `Fe^(2+)` ions to give blue ppt.of`Fe_(4) [Fe(CN)_(6)]_(3)` and potassium thiocyanate reacts with `Fe^(3+)` ions to give a red colour of `Fe(CNS)_(3)`