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Both potassium ferrocyanide and potassiu...

Both potassium ferrocyanide and potassium ferricyanide are diamagnetic .

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False Potassium ferrocyanide `[Fe^(+2)(CN)_(6)]^(4-)` is diamagnetic but potassium ferricyanide `K_(3)[Fe^(+3)(CN)_(6)]^(3-)`
is paramagnetic
`Fe^(+2) =3d^(6),CN^(Θ)` is a strong ligand so pairing occurs and have no unpaired electrons. Hence diamagnetic
`Fe^(+3) =3d^(5)`, pairing occurs and have one unpaired electron So paramagnetic .
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Assertion : Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic. Reason : Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.

Potassium is

Knowledge Check

  • Potassium ferrocyanide is a

    A
    (a) Normal salt
    B
    (b) Mixed salt
    C
    (c) Double salt
    D
    (d) Complex salt

  • Assertion : Conversion of potassium ferrocyanide to potassium ferricyanide is an oxidation process. Reason : Oxidation is the addition of oxygen/electronegative element to a substance or removal of hydrogen/electropositive element from a substance.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • The ligand in potassium ferricyanide is

    A
    (a) `K^(+)`
    B
    (b) `CN^(-)`
    C
    (c) `Fe^(3+)`
    D
    (d) `(CN)_6`

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