Which one of the following impurities present in a colloidal solution cannot be removed by electrodialysis?

$A$ precipitate is changed to a colloidal solution by the following process:

Which of the following phenomena is kinetic in nature?

$Statement-1$: 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 $CMC$.

Match List-$I$ with List-$II$.

List-$I$ (Colloid Preparation Method)	List-$II$ (Chemical Reaction)
$(a)$ Hydrolysis	$(i) \; 2 AuCl_{3} + 3 HCHO + 3 H_{2}O \rightarrow 2 Au(sol) + 3 HCOOH + 6 HCl$
$(b)$ Reduction	$(ii) \; As_{2}O_{3} + 3 H_{2}S \rightarrow As_{2}S_{3}(sol) + 3 H_{2}O$
$(c)$ Oxidation	$(iii) \; SO_{2} + 2 H_{2}S \rightarrow 3 S(sol) + 2 H_{2}O$
$(d)$ Double Decomposition	$(iv) \; FeCl_{3} + 3 H_{2}O \rightarrow Fe(OH)_{3}(sol) + 3 HCl$

Choose the most appropriate answer from the options given below.

For a gold sol,the dispersed phase,dispersion medium,and the nature of the colloidal solution (lyophilic or lyophobic) are respectively ......