Question

Boot polish contain
$A.$ Liquid dispersed phase in solid dispersion medium
$B.$ Liquid dispersed phase in liquid dispersion medium
$C.$ Solid dispersed phase in liquid dispersion medium
$D.$ Gas dispersed phase in liquid dispersion medium

Answer 1

Boot polish is a colloid solution. Colloid solutions are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. Size of the particles in a colloid can range $1nm - 1000nm.$ Colloidal particles cannot be seen by naked eye but can be seen through a microscope.

Complete step by step answer:
Colloid solutions are classified on the basis of dispersed phase and dispersion medium. The dispersed phase is a phase that is present in the form of colloid particles called the dispersed phase. The medium in which the colloid particles are dispersed is called the dispersion medium. In boot polish dispersed phase is liquid and the dispersion medium is solid. This type of combination is called Gel.
Thus the Boot polish contains liquid dispersed phase in solid dispersion medium. So, the correct option is $A$ .

Additional information:
Table summarizes the type of colloid solution on the basis of dispersed phase and dispersion medium

Type of colloid solution	Dispersed Phase	Dispersed Medium	Examples
Smoke (aerosol)	Solid	Gas	Dust, soot in air
Sol	Solid	Liquid	Ink, Colloidal gold
Solid sol	Solid	Solid	Ruby glass and alloy
Liquid aerosol	Liquid	Gas	Fog and clouds
Emulsion	Liquid	Liquid	Milk and hair cream
Gel	Liquid	Solid	Butter and cheese
Foam	Gas	liquid	Whipped cream and shaving cream
Solid foam	Gas	Solid	Cork, pumice stone

Note:
As we see in above table there is no combination of gas dispersed phase and gas dispersed medium as in the case solid in solid and liquid in liquid because gas in gas form a homogeneous solution which is not a colloid solution. Colloids solutions are heterogeneous mixtures.