Write true or false.

(i) Diffusion is the movement of molecules from a region of their lower concentration to that of a higher one.

(ii) Osmosis includes diffusion, but not vice versa.

(iii) Osmosis is unidirectional.

(iv) Exosmosis may cause bursting of a cell.

(v) Semi-permeable membrane prevents the passage of the solute molecules.

(vi) In an experiment on osmosis, if external pressure is applied on a dilute solution, less water will pass into the concentrated solution.

(i) False
Corrected Statement — Diffusion is the free movement of molecules of a substance (solute or solvent, gas, liquid) from the region of their higher concentration to the region of their lower concentration when the two are in a direct contact.

(ii) True

(iii) True

(iv) False
Corrected Statement — Endosmosis may cause bursting of a cell.

(v) True

(vi) False
Corrected Statement — In an experiment on osmosis, if external pressure is applied on a dilute solution, more water will pass into the concentrated solution.