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As2S3 sol has a negative charge. Capacit...

`As_2S_3` sol has a negative charge. Capacity to precipitate it is highest in

A

`AlCl_(3)`

B

`Na_(3)PO_(4)`

C

`CaCl_(2)`

D

`K_(2)SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
Negatively charged `As_(2)S_(3)` sol coaulated most effectively by `AlCl_(3)`. This is because oppositely charged `Al^(+++)` ions have maximum charge.
`As^(3+) gt Ca^(2+) gt Na^(+)`.
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Knowledge Check

  • As_(2)S_(3) has a negative charge. Capacity to precipate it is highest in

    A
    `AlCl_(3)`
    B
    `Na_(3)PO_(4)`
    C
    `CaCl_(2)`
    D
    `K_(2)SO_(4)`

  • As_2S_3 sol is a

    A
    Positive colloid
    B
    negative colloid
    C
    neutral colloid
    D
    none of these

  • An As_(2)S_(3) sol carries a negative charge the maximum precipitating power for this sol is shown by

    A
    `K_(2)SO_(4)`
    B
    `CaCl_(2)`
    C
    `Na_(3)PO_(4)`
    D
    `AlCl_(3)`

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    An arsenious sulphide sol carries a negative charge . The maximum precipitating power for this sol is possessed by

    Assertion (A) : When freshly precipitated nickel sulphide (NiS) is shaken with a solution of hydrogen sulphide, a colloidal sol. is obtained . Reason (R): The cause of peptization is the development of positive or negative charge on the precipitates by selective adsorption of ions from electrolytes.

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