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The INCORRECT statements below regarding colloidal solutions is : (1) A colloidal solution shows colligative properties. (2) An ordinary filter paper can stop the flow of colloidal particles. (3) The flocculating power of Al3+ is more than that of Na+. (4) A colloidal solution shows Brownian motion of colloidal particles.

1. (1)
2. (2)
3. (3)
4. (4)

Correct answer: (4)

Solution

The correct option is (4) because colloidal solutions do exhibit Brownian motion, which is the random movement of particles suspended in a fluid due to collisions with molecules of the fluid. Therefore, stating that a colloidal solution shows Brownian motion is accurate.

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