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In any ferric salt on adding potassinum ...

In any ferric salt on adding potassinum ferrocyanide, a prussian blue colour is obtanied, which is mainly due to the formation of

A

`K_(3)Fe(CN)_(6)`

B

`Kfe[Fe(CN)_(6)]`

C

`FeSO_(4).Fe(CN)_(6)`

D

`Fe_(4)[Fe(CN)_(6)]_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`underset("Pot. ferrocyanide")(3K_(4)[Fe(CN)_(6)]+4FeCl_(3) rarr underset(underset("(Prussian blue)") ("Ferri ferrocyanide"))(Fe_(4)[Fe(CN)_(6)]_(3)+12 KCl)`
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Knowledge Check

  • The deep blue colour of compound (D) is due to the formation of:

    A
    a.
    B
    b.
    C
    c.
    D
    d.Both `(a)` and `(b)`.

  • Colour of the bead in borax bead testis mainly due to the formation of

    A
    metal oxides
    B
    boron oxide
    C
    metal metaborates
    D
    elemental boron.

  • Ferric ion forms a prussian blue coloured solution with K_(4)[Fe(CN)_(6)] due to the formation of -

    A
    `K_(3)Fe(CN)_(6)`
    B
    `Fe_(4)[Fe(CN)_(6)]_(3)`
    C
    `Fe(OH)_(3)`
    D
    `KFe[Fe(CN)_(6)]`

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