Question

For the given aqueous reactions, which of the statements(s) is ( are) true ? Excess
`KI+K_(3)[Fe(CN)_(6)]overset("dilute"H_(3)SO_(4))(rarr)` brownish yellow solution `overset(ZnSO_(4))(rarr) white ppt + brownish yellow filtrate `overset(Na_(2)S_(2)O_(3))(rarr)` colourless solution
A. The first reaction is a redox reaction
B. White precipitate is `Zn_(3)[Fe(CN)_(6)]_(2)`
C. Addition of filtration to starch solution gives blue colour
D. White precipitate is soluble in NaOH solution

Answer 1

Correct Answer - A,C,D
Brownish yellow solution is `K_(4)[Fe(CN)_(6)]`
White ppt is `K_(2)Zn[Fe(CN)_(6)]` or
`K_(2)Zn_(3)[Fe(CN)_(6)]_(2)&` Brownish yellow filterate is `I_(2)`.