The incorrect statements are -

Chemistry Surface Chemistry General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

For coagulation of As 2 S 3 sol, +ve ions are effective.

For coagulation of aluminium hydroxide sol Ba 2+ ions are more effective than Na +

Cellulose solution is an example of multimolecular colloid system

Colloidal sol of metals such as gold, silver etc are prepared by Bredig's arc method.

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The correct answer is:

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(b,c)

Aluminium hydroxide is a +ve sol, so – ve ions are effective in coagulation.

Cellulose solution is an example of macromolecular colloid.

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