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Which of the following electrolytes will...

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

A

`NaNO_3`

B

`K_4[Fe(CN)_6]`

C

`Na_3PO_4`

D

`MgCl_2`

Text Solution

Verified by Experts

The correct Answer is:
D
Gold sol = -ve sol, coagulation `alpha` charge
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