The graph given below is showing the relation between the extent of adsorption $(x / \mathrm{m})$ and pressure at different temperatures. The correct order of temperatures for curves i , ii and iii is

Consider the following about the tyndall effect.

(I) It is used to distinguish between a true and colloidal solution.

(II) It is possible only when the dispersed medium and dispersed phase differ much in their refraction indices.

(III) It is observed only when the size of colloidal particles is much smaller than the wavelength of the light used.

The correct statements are

Identify the factors which favour the physical adsorption from the following

(I) High surface area

(II) Low temperatures

(III) High temperatures

(IV) Low pressures

(V) High pressures

The process in which colloids, when subjected to DC electric field move towards an electrode is