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The EAN of iron in potassium ferricyanid...

The EAN of iron in potassium ferricyanide is

A

18

B

54

C

35

D

23

Text Solution

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The correct Answer is:
C
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The oxidation number of iron in potassium ferricyanide [K_(3)Fe(CN)_(6)] is :-

Calculate the percentage of iron in potassium ferrocyanide. K_(4)(Fe(CN)_(6)] (K = 39, Fe = 56, C = 12, N = 14)

Knowledge Check

  • What happens when an alkaline solution of potassium ferricyanide is reacted with H_(2)O_(2) ?

    A
    Potassium ferricyanide is oxidised to potassium ferrocyanide becomes colourless and `H_(2)O_(2)` is oxidised.
    B
    Potassium ferricyanide becomes colourless and `H_(2)O_(2)` is oxidised to `O_(2)`.
    C
    Potassium ferricyanide is reduced to ferric hydroxide and `H_(2)O_(2)` is oxidised to `H_(2)O`.
    D
    Potassium ferricyanide is reduced to potassium ferrocyanide and `H_(2)O_(2)` is oxidised to `O_(2)`.

  • 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.

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    What happens when: a. Chromium hydroxide is treated with hydrogen peroxide in the presence of sodium hydroxide. b. Hydrogen peroxide is added to ferrous ammonium sulphate solution. c. hydrogen peroxide is added to acidified potassium permanganate. d. An alkaline solution of potassium ferricyanide is reacted with H_(2)O_(2) .

    Write the equations . (i) Acidified solution of K_(2)Cr_(2)O_(7) turns green when sodium sulphite is added to it. (ii) Potassium ferricyanide is added to ferrous sulphate . (iii) Silver chloride is treated with aqueous sodium cyanide . (iv) Zinc is exposed to moist air .

    Both potassium ferrocyanide and potassium ferricyanide are diamagnetic .

    The EAN of platinum in potassium hexachloridoplatinate (IV) is (Atomic number of Pt=78)

    The EAN of Fe atom in .

    Salts K, L, M, N and O undergo reaction (i) to (v) respectively with different reagents given below. Identify the cation present in these salts on the basis of these reaction. Tabulate your answer in the format given below: (i) Addition of potassium chromate solution to a solution of salt K gives a golden yellow precipitate. (ii) Addition of potassium ferrocyanide solution to a solution of slat L gives a chocolate brown precipitate. (iii) Addition of potassium ferricyanide solution to a solution of salt M gives an intese deep blue solution. (iv) Addition of potassium ferrocyanide solution to a solution of O gives a bluish white precipitate.

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