Identify the colloidal molecule containing a hydrophilic head and a hydrophobic tail.

$Statement-1$: Micelles are formed by surfactant molecules above the critical micellar concentration $(CMC)$.
$Statement-2$: The conductivity of a solution having surfactant molecules decreases sharply at the $CMC$.

Colloidal solutions can be purified by

What is the cause of the stability of lyophilic colloids?

The greater the valence of the flocculating ion added,the greater is its power to cause precipitation of a colloid. This rule is

Match the following types of colloidal systems given in List-$I$ with their respective names given in List-$II$.

List-$I$	List-$II$
$(A)$ Solid dispersed in liquid	$(I)$ Emulsion
$(B)$ Liquid dispersed in liquid	$(II)$ Foam
$(C)$ Gas dispersed in liquid	$(III)$ Gel
$(D)$ Liquid dispersed in solid	$(IV)$ Sol
-	$(V)$ Aerosol