Question

In which of the following colloids, coagulation will occur near cathode on electrophoresis?

• A. Sol obtained on mixing $AgN{O}_{3\left(aq\right)}$ with excess of KI solution.
• B. Sol of muddy water
• C. $A{s}_2{S}_3$ sol
• D. $Fe(OH{)}_3$

Answer 1

The correct option is D $Fe(OH{)}_3$

Positive sol is coagulated near negative electrode.
a) negative sol
b) negative sol
c) negative sol
d) positive sol
Hence $Fe(OH{)}_3$ can be coagulated near cathode.