What term refers to a homogeneous mixture that will never settle and has particles too small to be detected by a microscope?

What term refers to a homogeneous mixture that will never settle and has particles too small to be detected by a microscope?

• A. Solids
• B. Gases
• C. Plasma
• D. Solution

Answer: (D)

A solution is a homogeneous mixture where a substance (the solute) dissolves in another (the solvent) to form a single, uniform substance. Because the particles are dissolved at the molecular level, they are spread evenly throughout and stay that way, so there’s no distinct layer or settling over time. The particles are so small that they can’t be seen even with a light microscope, which is why the mixture looks the same everywhere and doesn’t separate. This description matches a solution: a uniformly mixed material with dissolved particles that don’t settle out. Other states described—solids, gases, or plasma—don’t capture the idea of a dissolved, uniformly distributed mixture in the same way, even though gases are also often well-mixed; the key point here is the dissolved, invisible particles within a liquid forming a single phase.

A solution is a homogeneous mixture where a substance (the solute) dissolves in another (the solvent) to form a single, uniform substance. Because the particles are dissolved at the molecular level, they are spread evenly throughout and stay that way, so there’s no distinct layer or settling over time. The particles are so small that they can’t be seen even with a light microscope, which is why the mixture looks the same everywhere and doesn’t separate.

This description matches a solution: a uniformly mixed material with dissolved particles that don’t settle out. Other states described—solids, gases, or plasma—don’t capture the idea of a dissolved, uniformly distributed mixture in the same way, even though gases are also often well-mixed; the key point here is the dissolved, invisible particles within a liquid forming a single phase.