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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.

These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic. Reason: Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.

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`