Question

Water-in-oil emulsions is also called as-

Answer 1

Emulsion is a brew of two or more liquids that are normally unblendable or unmixable. That is to say, a brew of two unmixable liquids. Emulsion is a brew of two or more liquids, in this one is present as droplets (in microscopic or ultramicroscopic size), scattered throughout the other. Unsteady emulsions get separate into two liquid layers in the end.

Complete answer:
Two different types of liquid can form so many different types of emulsion. For example, we can take the oil and water, they both are different types of liquids that can’t mix with each other normally. But they can form different types of emulsion. Firstly, “Oil-in-water” emulsion, where the oil acts as the dispersed phase and the water acts as the continuous phase or the dispersed medium of this emulsion. Secondly, “Water-in-oil” emulsion, where the water acts as the dispersed phase and the oil acts as the continuous phase. Using these two liquids multiple emulsions are also possible, like “water-in-oil-in-water” emulsion and “oil-in-water-in-oil” emulsion.
In Water-in-oil emulsion, dispersed phase is mixed into the continuous phase. In easy words, one liquid acts as the base and in that base another liquid is mixed. When an Emulsion is “Water-in-oil”, that means here water is the dispersed phase, that is distributed into the continuous phase, that is oil. Continuous phase is also called as the Dispersed medium.
Water-in-oil emulsion are in other words, Oily Emulsion.

Note:
The example of a water-in-oil emulsion is Butter. Here the milk proteins are emulsifiers. In this type of emulsion water is the dispersed phase and the oil is dispersion medium, that called as continuous phase.