Consider the following experiments and answer the questions at the end of it
(A) When `Fe(CN)_(2)` solution is treated with `KCN` solution species formed no longer gives tests of `Fe^(2+)` and `CN^(Θ)`
(B) When `K_(2)SO_(4)` solution is treated with `A1_(2)(SO_(4))_(3)` solution species formed gives tests of `K^(o+)`,A1^(3+)` and `SO_(4)^(2-)`
When the species formed in `A` is treated with `FeCI_(3)`a bule colour is obtained It is due to formation of .

Options

A. `Fe^(II) [Fe^(III)(CN)_(6))]^(Θ)`
B. `Fe^(II) [Fe^(III)(CN)_(6))]^(Θ)`
C. Both(a)and(b)
D. None of these

Answer

C

Explanation

Blue colour is a mixture of Prussian blue and Turnbull's blue. [Refer Note in Section 7.17 (Point2)] .