Question

Colloids may be more than a thousand times as big as an atom but are more than a thousand times smaller than an ant. These colloids can be removed from a solution by:

• A. Thin piece of cloth
• B. Centrifuge
• C. Filter paper
• D. Parchment paper

Answer 1

Answer: (B)

Centrifuge

Particles of colloids range from $1-1000$ $nm$ which is very small than pores of filter paper, thin piece of cloth or parchment paper so can't be separated by them but can be separated by ultrafiltration and centrifuge.

In the centrifugation process, a centrifuge is used to rotate the colloidal solution at a very high speed because of which colloidal particles settle at the bottom of the centrifuge tube and colloidal particles can be separated by decanting the solution.