Question

Match the statement given in Column I with the phenomenon given in Column II.

Column I	Column II
(i) Dispersion medium moves in an electric field	(a) Osmosis
(ii) Solvent molecules pass through semi permeable membrane towards solvent side	(b) Electrophoresis
(iii) Movement of charged colloidal particles under the influence of applied electric potential towards oppositely charged electrodes	(c) Electroosmosis
(iv) Solvent molecules pass through semi permeable membranes towards solution side	(d) Reverse osmosis

Answer 1

Column I	Column II
(i) Dispersion medium moves in an electric field	(c) Electroosmosis
(ii) Solvent molecules pass through semi permeable membrane towards solvent side	(d) Reverse osmosis
(iii) Movement of charged colloidal particles under the influence of applied electric potential towards oppositely charged electrodes	(b) Electrophoresis
(iv) Solvent molecules pass through semi permeable membranes towards solution side	(a) Osmosis

Explanation:

(i) When electrophoresis i.e., movement of particles is prevented by some suitable means, it is observed that the dispersion medium begins to move in an electric field. This phenomenon is termed Electroosmosis.

(ii) Solvent molecules pass through semi-permeable membrane towards solvent side is termed as reverse osmosis.

(iii) When electric potential is applied across two platinum electrodes dipping in a colloidal solution, the colloidal particles move towards one or the other electrode. The movement of colloidal particles under an applied electric potential is called electrophoresis.

(iv) Solvent molecules pass through semipermeable membrane towards solution side is termed as osmosis.