Which term describes a stable mixture of two or more substances that remains uniformly distributed without settling?

• A. Suspension
• B. Colloid
• C. Mixture
• D. Solution

Answer: (D)

Think of a solution as a homogeneous blend formed when a substance dissolves in another, giving a uniform composition throughout and staying the same over time without separating. That exactly matches a stable mixture that remains uniformly distributed and does not settle.

A suspension, by contrast, contains larger particles that would eventually settle to the bottom if left undisturbed, so it’s not uniformly distributed over time. A colloid looks uniform and stays dispersed, but its particles aren’t truly dissolved and can show light-scattering effects; it isn’t a true solution. A general mixture is a broad term that can be either uniform or not, and doesn’t guarantee the stable, dissolved nature of a solution.

So the term that best fits a stable, uniformly distributed mixture with no settling is a solution.