Chemistry - Surface Chemistry Question with Solution | TestHub

A. Migration of dispersed phase under the effect of electric field is called electrophoresis. This statement is CORRECT. Electrophoresis is the movement of charged colloidal particles (dispersed phase) in an electric field.

B. Migration of dispersed phase under the effect of electric field is called electro osmosis. This statement is INCORRECT. Electro-osmosis is the movement of the dispersion medium (solvent) relative to a stationary charged surface under the influence of an electric field.

C. The charge on colloidal particle is negative if dispersion medium move towards anode electrode. This statement is INCORRECT. If the dispersion medium moves towards the anode (positive electrode), it means the medium itself is negatively charged relative to the stationary dispersed phase. This implies the colloidal particles (dispersed phase) are positively charged.

D. The charge on colloidal particle is positive if dispersion medium move towards cathode electrode. This statement is INCORRECT. If the dispersion medium moves towards the cathode (negative electrode), it means the medium itself is positively charged relative to the stationary dispersed phase. This implies the colloidal particles (dispersed phase) are negatively charged.

Therefore, statements B, C, and D are incorrect. The question asks for "Which of the following statements is incorrect", implying there might be multiple incorrect statements or a single best incorrect statement. Given the options, B, C, and D are all factually incorrect descriptions of the phenomena.

Final Answer: B, C, D