Question

The coagulation of sol particles may be brought by :

• A. heating.
• B. adding oppositely charged sol.
• C. adding electrolyte.
• D. persistent dialysis

Answer 1

Answer: (B), (C)

adding oppositely charged sol.
adding electrolyte.

Coagulation is the process in which a colloid precipitates out of a solution. The precipitation is brought by induced aggregation, that is by addition oppositely charged sol and persistent dialysis but not by heating and addition of electrolyte.