A homogeneous mixture of more than one substance in a single phase is called a...

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

Answer: (B)

A homogeneous mixture in a single phase is a solution because its components are dissolved uniformly at the molecular or ionic level, giving a uniform composition throughout the entire sample. There are no visible boundaries between parts, and the mixture remains the same throughout (no settling under normal conditions).

In contrast, suspensions contain larger particles that are not uniformly distributed and tend to settle out, showing more than one phase. Colloids look uniform to the naked eye but are actually heterogeneous, with a dispersed phase in a continuous medium and often exhibit light scattering. Emulsions are mixtures of two immiscible liquids with droplets of one dispersed in the other, also not a single homogeneous phase. Hence, the term that fits is solution.