What term describes mixtures where fine solid particles are dispersed in a liquid and do not dissolve, requiring agitation to maintain uniform distribution?

• A. Solutions
• B. Suspensions
• C. Emulsions
• D. Adjuvant

Answer: (B)

When solid particles are dispersed in a liquid but do not dissolve and must be stirred or shaken to stay evenly distributed, you’re looking at a suspension. In a suspension, the particles are spread throughout the liquid but are not dissolved, so they tend to settle out over time and require agitation to maintain a uniform mix. This is different from solutions, where the material dissolves completely and forms one uniform phase with no settling. Emulsions involve droplets of one liquid dispersed in another liquid, not solid particles in a liquid. Adjuvants are additives that enhance how a pesticide works and are not a dispersion type.