Question

A compound `(A)` is used in paints instead of salts of lead. . Compound(A) is obtained when a white compound `(B)` is strongly heated . Compound `(B)` is insoluble in water but dissolves in sodium hydroxide forming a solution of compound `(C )` the compounds `(A)` on heating with coke gives a metal `(D)` and a gas `(E)` which burns with blue flame . `(B)` also dissolves in ammonium sulphate solution mixed with ammonium hydroxide. solution of compound `(A)` in dilute `HCl` gives a bluish white//white precipitate `(F)` with excess of `(F)` with excees of `K_(4)[Fe(CN)_(6)]` identify `(A)` to `(F)` and explain the reactions.
A. Solution (F)
B. Solution (H)
C. A and B both
D. None of these

Answer 1

Correct Answer - A
`Fe^(2+)+K_(4)[Fe(CN)_(6)]rarr`White ppt
`Fe^(3+)+K_(4)[Fe(CN)_(6)]rarr` Blue colouration
`Fe^(2+)+K_(4)[Fe(CN)_(6)]rarr `Blue colouration
`Fe^(3+)+K_(3)[Fe(CN)_(6)]rarr ` Red - brown colouration