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In blue solution of copper sulphate exce...

In blue solution of copper sulphate excess of KCN is added then solution becomes colourless due to the formation of:

A

`Cu(CN)_(4)^(2-)`

B

`Cu^(2+)` gets reduced to `[Cu(CN)_(4)]^(3-)`

C

`Cu(CN)_(2)`

D

`CuCN`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • In solution of AgNO_(3) .If Cu is added, the solution becomes blue due to

    A
    oxidation of Ag
    B
    oxidation of Cu
    C
    reduction of Ag
    D
    reduction of Cu

  • When excess of dilute NH_(4)OH is added to an aqueous solution of copper sulphate an intense blue colour is developed.This is due to the formation of:

    A
    `[Cu(NH_(3))_(6)]^(2+)`
    B
    `Cu(OH)_(2)`
    C
    `[Cu(NH_(3))_(4)]^(2+)`
    D
    `(NH_(4))_(2)SO_(4)`

  • In solutionof AgNO_(3) if Cu is added solution become blue due to

    A
    Oxidation of Ag
    B
    Oxidation of Cu
    C
    Reduction of Ag
    D
    Reduction of Cu

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    Copper sulphate dissolves in excess of KCN to give

    STATEMENT - 1 : A dark blue colour is obtained on adding excess of dilute NH_(4)OH solution in aqueous soluiton of copper sulphate. and STATEMENT - 2 : Dark blue colour is due to the formation of [Cu(NH_(3))_(4)]^(2+) complex ion.

    Copper sulphate dissolved in excess of KCN to give:-

    When a copper wire is placed I a solution of AgNO_3 , the solution acquires blue colour. This due to the formation of .

    When NH_4OH is added to copper sulphate solution, blue colour is obtained due to formation of

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