Question

sewage treatment plants use settling tanks to separate raw sewage into solid and liquid components. what type of mixture might include a solid component that separates from a liquid component by settling over time? a. colloid b. solution c. heterogeneous d. homogeneous

Explanation:

In a heterogeneous mixture, components are not uniformly distributed and can separate over time by physical means like settling. Sewage is a heterogeneous mixture as it contains solid and liquid parts that can be separated in settling tanks. Colloids do not settle out easily, solutions are homogeneous mixtures with solute uniformly dissolved in a solvent, and homogeneous mixtures have uniform composition throughout and don't separate by settling.

Answer:

C. heterogeneous