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When K(4)[Fe(CN)(6)] is treated with FeC...

When `K_(4)[Fe(CN)_(6)]` is treated with `FeCI_(3)` a blue colour is obtained It is due to the formation of .

A

`Fe^(II)[Fe^(III)(CN)_(6)]^(Θ)`

B

`Fe^(III)[Fe^(II)(CN)_(6)]^(Θ)`

C

Both (a) and (b)

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
X -ray studies have established that Prussian blue and Turnbull 's blue are identical `Fe^(3+)` partially oxidises
`[Fe^(II) (CN)_(6)]^(4-)` forming some `[Fe^(III) (CN)_(6)]^(3-)`
Thus `Fe[Fe(CN)_(6)]^(Θ)` is formed .
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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 FeCl_(3) a bule colour is obtained It is due to formation of .

The compound K_(4)[Fe(CN)_(6)] is called

Knowledge Check

  • O.N of Fe in K_(4)[Fe(CN)_(6)] is

    A
    `+2`
    B
    `+3`
    C
    `+4`
    D
    `+6`

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