Question

Emulsions of polyvinyl acetate are used in?
A) Polishes
B) Firecrackers
C) Crayons
D) Latex paints

Answer 1

Hint:Emulsion is a phase in which fine droplets of one liquid are immersed in another liquid that is not soluble or miscible. Polyvinyl acetate is a synthetic polymer and it is used as an emulsion in some coloring materials. One can apply the idea of emulsion to given options and make the correct choice.

Complete answer:1) First of all we will learn about the concept of emulsion which will give us an idea to solve the question. An emulsion is a liquid droplet present in a liquid phase which is not soluble in each other. That means if we use emulsion in coloring agents we can say that there might be droplets of many colors that are immersed in the liquid phase of one major color.
2) Now the polyvinyl acetate is an aliphatic synthetic polymer that is used as an emulsion in coloring materials. Now let's analyze the given options one by one and decide which can be the correct choice.
3) The option A material polishes are used as a finishing material that gives a final touch to objects. This is obtained by scrubbing and rubbing the material hence, this can not be an emulsion. Hence, this is an incorrect choice.
4) The firecrackers are solid materials in which polyvinyl acetate can not be used as an emulsion.
5) Crayons are solid coloring pencils which are of only one color. Hence this can't be an emulsion.
6) Latex paints are water-based paints that are used for walls that consist of pigments bound in a synthetic resin. Latex paints form an emulsion with water in which polyvinyl acetate is used.
Therefore, the correct option is D.

Note: It is important to remember that in an emulsion the droplets and the liquid are both the liquid phase materials and seem distinct as they are insoluble in each other. It is impossible to have a total solid material as an emulsion. Oil dispersed (not on surface) in the liquid is a perfect example of an emulsion.