Question

The small liquid droplets dispersed in another liquid is called ___.

Answer 1

Hint: Here, it is said that small liquid droplets are dispersed in another liquid, so dispersion is just the scattering of fine particles of a substance through some other substance. Now, let’s see what that means.

Complete answer:
First of all, let’s understand the meaning of the dispersed phase and dispersed medium. Dispersed phase can be defined as the phase in which the colloidal particles are dispersed and dispersion medium can be defined as the medium in which these colloidal particles are dispersed. For example: starch solution- here, in this starch is the dispersed phase and the water present in it, is the dispersion medium.
So, emulsions are those colloidal solutions in which the dispersed phase and dispersion medium both are in liquid state but are immiscible. Emulsions are formed using certain mechanisms such as agitation in which the two liquids are mixed with no mutual solubility. Emulsions are stabilized by the addition of certain emulsifying agents which form a film at the surface of those dispersed droplets. Otherwise, the unstable form gets separated on its own into two different immiscible layers of liquid.
Examples of some emulsions: milk (fat molecules in the aqueous solution), hair cream and butter.
Emulsions have certain properties such as:
Emulsion has a boundary called interface between continuous and dispersed phase.
They have a very cloudy appearance which is caused due to the scattering of light at the phase interface.
When the dispersed light is in equal proportion, then we get a white colored emulsion.
They show the Tyndall effect if the emulsion is in diluted form due to the less dispersed solute or colloidal particles which leads to the blue colored solution.
Therefore, the small liquid droplets dispersed in another liquid is called Emulsion.

Note:
In such type of questions in which these colloidal systems are asked we need to focus and take care of the dispersed phase and dispersion medium than only we will be able to identify the correct colloidal system, such as when both of them are liquid then it is an emulsion and is both of them are solid then it is a solid sol and so on.