Which of the following statement(s) is (are) incorrect ?

Options

A. `Fe^(2+)` ions give a dark blue precipitate with potassium hexacyanidoferrate `(III)` solution.
B. `Fe^(3+)` ions give intense blue precipitate with potassium hexacyanidoferrate `(II)` solution.
C. `Fe^(3+)` ions give a brown colouration with potassium hexacyanidoferrate `(III)` solution.
D. `Fe^(2+)` ions give a deep red colouration with ammonium thicyanate.

Answer

D

Explanation

(A)`Fe^(2+)+[Fe(CN)_(6)]^(3-)toFe^(3+)+[Fe(CN)_(6)]^(4-)`
`4Fe^(3+)+3[Fe(CN)_(6)]^(4-)toFe^(4+)[Fe(CN)_(6)]_(3)`(turnbull's blue)
(B)`4Fe^(3+)+3[Fe(CN)_(6)]^(4-)toFe^(4+)[Fe(CN)_(6)]_(3)`(intense blue)
(C)`Fe^(3+)+[Fe(CN)_(6)]^(3-)toFe[Fe(CN)_(6)]`(brown colouration)
(D)`Fe^(3+)+4SCN^(-)toFe(SCN)_(3)`(deep red colouration)
`Fe^(2+)+4 SCN^(-)to`No reaction