Wisconsin Esthetics State Board Practice Test

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What describes a suspension?

An even dispersion of a solid substance in a liquid base.
A type of emulsion with a high oil content.
A gas mixed with a solid.
A solution where the solute is fully dissolved.

The correct answer is: An even dispersion of a solid substance in a liquid base.

A suspension is defined as a heterogeneous mixture in which solid particles are dispersed throughout a liquid. The solid particles do not dissolve in the liquid; instead, they remain suspended, giving the mixture an uneven appearance. This means that the solid components may settle at the bottom over time if the mixture is left undisturbed. In contrast, an emulsion would refer to a mixture of two immiscible liquids where one liquid is dispersed in the other, which does not apply to the definition of a suspension. The other options describe either gas-solid interactions or solutions where the solute is completely dissolved, neither of which aligns with the characteristics of a suspension. Thus, defining a suspension as an even dispersion of solid substances in a liquid accurately captures its essential properties.