An arsenious sulphide sol carries a nega...

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

A

`K_(2)SO_(4)`

B

`CaCl_(2)`

C

`Na_(3)PO_(4)`

D

`AlCl_(3)`

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The correct Answer is:

D

`-ve` charged sol is coagulated by cation of electrolyte. More the charge on cation, higher the precipitating power/

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