Nevada State Board of Cosmetology Practice Exam

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What is formed when 2 or more non-mixable substances are united with the help of a binder or gum-like substance?

Emulsion
Solution
Suspension
Paste

The correct answer is: Emulsion

An emulsion is formed when two or more non-mixable substances are united with the help of a binder or gum-like substance. This binds the substances together and allows them to form a stable mixture. A solution, on the other hand, is formed when one substance dissolves into another and becomes evenly distributed throughout. A suspension is when small particles are dispersed throughout a liquid, but eventually settle and separate. A paste is a thick, sticky mixture that is formed when a liquid is mixed with a solid material. Therefore, the most appropriate answer is A, emulsion, as it specifically mentions the use of a binder or gum-like substance to unite non-mixable substances into a stable mixture.