What are permanent mixtures of two or more immiscible substances held together with a binder called?

Permanent mixtures of two or more immiscible substances held together with a binder are known as emulsions. Emulsions are created when two liquids that normally do not mix, such as oil and water, are combined with an emulsifying agent or binder. This agent stabilizes the mixture, enabling the immiscible substances to remain evenly distributed without separating.

For example, in the cosmetic industry, emulsions are common in products like creams and lotions, where oil and water must blend smoothly to create a stable formulation that can hydrate the skin.

In contrast, suspensions are heterogeneous mixtures where solid particles are dispersed in a liquid but may settle over time unless mixed. Solutions are homogeneous mixtures where one substance dissolves into another, creating a uniform composition. The term mixes is more general and does not specify the characteristics or stability of the mixture like emulsions do. Therefore, identifying emulsions as the correct answer highlights their unique property of stability in combining immiscible substances.