A. $\rightarrow(2)$ B. $\rightarrow$ (3) C. $\rightarrow(4)$ D. $\rightarrow$ (1)

A. Lyophobic colloid (solvent hating colloid) are readily protected by small amount of electrolyte. These colloids are also stabilised by addition of lyophilic colloids which makes a protective layer around lyophobic sol. Hence, lyophilic sol are known as protective colloid.

B. Liquid-liquid colloid is also known as emulsion if they are partially miscible or immiscible liquids.

C. When $\mathrm{FeCl}_3$ is added to hot water it lead to the formation of positively charged colloid.

D. When NaOH is added to $\mathrm{FeCl}_3$ it lead to the formation of negatively charged colloid.

A. $\rightarrow(2)$ B. $\rightarrow(3)$ C. $\rightarrow$ (4) D. $\rightarrow$ (1)

Colloids are classified on the basis of types of dispersed phase and dispersion medium.

A. $\rightarrow$ (4) B. $\rightarrow(3)$ C. $\rightarrow$ (1) D. $\rightarrow(2)$

A. Purification of colloid can be done by dialysis in which ions/particles are removed from solution through semipermeable membrane.

B. Peptisation is a process in which when small quantity of electrolyte (peptising agent) is added to precipitate. It leads to formation of colloidal solution.

C. The process of removing of oily or greasy dirt from the cloth is done by emulsification.

D. Process of setting of colloidal particle is called coagulation. Electrophoresis is a process in which on applying electric potential to the electrodes dipped in sol, the oppositely charged particles of colloidal solution move towards oppositely charged electrodes, get discharged and precipitated.

A. $\rightarrow(4)$ B. $\rightarrow$ (3) C. $\rightarrow(1)$ D. $\rightarrow$ (2)

A. Butter is an example of dispersion of liquid in solid.

B. Pumice stone is an example of dispersion of gas in solid in which gas bubbles are pearced within solid particles.

C. Milk is a dispersion of liquid in liquid in which fats and protein are dissolved in milk.

D. Paint is an example of solid in liquid.