Question

Under the influence of an electric field, the particles in a sol migrate cathode. The coagulation of the same sol is studied using `NaCl, Na_(2)SO_(4)` and `Na_(2)PO_(4)` solutions. Their coagulating values will be in maximum for `:`
A. `NaCl`
B. `Na_(2)SO_(4)`
C. `Na_(2)PO_(4)`
D. same for all

Answer 1

Correct Answer - 1
The sol particles migrate towards cathode.
So they are positively charged. Hence, anions would be effective in coagulation.
Greater is the valence of effective ion, smaller will be its coagulation value.