Question

A negatively charged solution will require minimum amount of which electrolyte for its coagulation?

• A. $NaN{O}_3$
• B. $Mg(N{O}_3{)}_2$
• C. $Al(N{O}_3{)}_3$
• D. $Th(N{O}_3{)}_4$

Answer 1

The correct option is D $Th(N{O}_3{)}_4$

Higher is the valency of an effective ion (carrying charge opposite to sol particles), more is the coagulating power, lesser is the coagulating value.

Since, among all cations, $Th$ has the maximum charge, the minimum amount of it will be required for coagulation.

Therefore, a negatively charged solution will require a minimum amount of $Th(N{O}_3{)}_4$ for its coagulation.