Question

The capacity of an ion to coagulate a colloidal solution depends on :

• A. its shape
• B. amount of its charge
• C. the sign of charge
• D. none of these

Answer 1

Answer: (B), (C)

The correct options are
B amount of its charge
C the sign of charge

Coagulation is the process by which a colloid precipitates out of a solution.
So, the coagulation depends on amount of its charge, the sign of charge but not on its size. Since precipitation of colloidal particles is a chemical process, it depends on charge of the particles but not on size of the particles.

Hence, options B and C are correct.