The $Gold \ Number$ indicates:

Muddy water can be purified through coagulation using

How will you distinguish between dispersed phase and dispersion medium in an emulsion?

When a colloidal solution is observed under a microscope,we can see:

Match the following:

List-$I$ (Colloidal solution)	List-$II$ (Use)
Colloidal antimony	$I$. Kala-azar
Argyrol	$II$. Eye lotion
Colloidal gold	$III$. Intramuscular injection
Milk of magnesia	$IV$. Stomach disorders

The correct answer is

Identify the correct statements from the following:
$(i)$ $A$ closed vessel containing $90 \%$ $CO_2$ and $10 \%$ $O_2$ is an aerosol.
$(ii)$ Milk is an emulsion.
$(iii)$ Smoke is an aerosol.
$(iv)$ Peptisation is a method of purification of colloidal solution.
$(v)$ Ultrafiltration is a method of purification of colloidal solution.