1.

Which of the following ion has the highest coagulation power for the sol. Which is obtained by the following reaction? `FeCl_(3)("excess")+NaOHtoSol`A. `Al^(3+)`B. `SO_(4)^(2-)`C. `l^(-)`D. `Na^(+)`

Answer» Correct Answer - B
The sol becomes positively charged dur to excess of `Fe^(3+)` ions.


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