Question

The incorrect statement below regarding colloidal solutions is:

विकल्प

• A colloidal solution shows colligative properties.

• An ordinary filter paper can stop the flow of colloidal particles.

• The flocculating power of Al⁺³ is more than that of Na⁺.

• A colloidal solution shows Brownian motion of colloidal particles.

Answer 1

An ordinary filter paper can stop the flow of colloidal particles.

Explanation:

Colloidal particles are small enough to pass through ordinary filter paper; only ultrafilters or special membranes can retain colloidal particles. Hence, ordinary filter paper cannot stop colloidal particles.