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p-Amino-N,N-dimethylaniline is added to ...

p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of aqueous solution of Y with reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, the treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z.
Q. Compound X is

A

`NaNO_(3)`

B

`NaCl`

C

`Na_(2)SO_(4)`

D

`Na_(2)S`

Text Solution

Verified by Experts

The correct Answer is:
D

The compound X is `Na_(2)S` and Y is `FeCl_(3)`.
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Knowledge Check

  • p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X. the resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. The compound Y is:

    A
    `MgCI_(2)`
    B
    `FeCI_(2)`
    C
    `FeCI_(3)`
    D
    `ZnCI_(2)`

  • p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X. the resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. The compound X is:

    A
    `NaNO_(3)`
    B
    `NaCI`
    C
    `Na_(2)SO_(4)`
    D
    `Na_(2)S`

  • p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X. the resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. The compound Z is:

    A
    `Mg_(2)[Fe(CN)_(6)]`
    B
    `Fe[Fe(CN)_(6)]`
    C
    `Fe_(4)[Fe(CN)_(6)]_(3)`
    D
    `K_(2)Zn_(3)[Fe(CN)_(6)]_(2)`