Question

what happens when a solid is dissolved into a liquid?
solid particles float toward the surface layer of liquid particles.
solid particles sink down toward the bottom layer of liquid particles.
solid particles become evenly dispersed among liquid particles.
solid particles become suspended in the middle of liquid particles.

Explanation:

When a solid dissolves in a liquid (forming a solution), the solute (solid) particles are separated and spread evenly among the solvent (liquid) particles. The first option is incorrect as dissolving isn't about floating to the surface. The second is wrong because dissolving isn't just sinking (that's more like sedimentation in a suspension). The fourth is incorrect as "suspended" refers to a suspension (where particles aren't dissolved and can settle), while dissolving leads to a homogeneous mixture with even dispersion. So the correct description is that solid particles become evenly dispersed among liquid particles.

Answer:

C. Solid particles become evenly dispersed among liquid particles.