A mixture where visible particles settle out unless stirred.

• A. Colloids
• B. Suspension
• C. Solution
• D. Nonelectrolyte

Answer: (B)

This describes a suspension. In a suspension, the dispersed particles are large enough to be seen and are not dissolved in the liquid, so they will settle to the bottom under gravity when the mixture is left undisturbed. Stirring or shaking re-disperses those particles, temporarily returning the mixture to a cloudy appearance. This behavior contrasts with a solution, where the solute is completely dissolved at the molecular level and nothing settles out, and with a colloid, where the particles are smaller and tend to stay dispersed for a longer time (though some may scatter light). Nonelectrolyte refers to whether a substance dissociates into ions in solution, not to whether particles settle. So the scenario aligns with a suspension because visible particles settle out unless the mixture is agitated.