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Which of the following electrolytes will...

Which of the following electrolytes will be most effective in the coagulation of gold sol :

A

`NaNO_(3)`

B

`K_(4)[Fe(CN)_(6)]`

C

`Na_(3)PO_(4)`

D

`NgCl_(2).`

Text Solution

Verified by Experts

The correct Answer is:
D
Gold sol is negatively charged. Hence, most effective for coagulation will be `Mg^(2+)` ions.
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