Question

what type of mixture scatters light and cannot be filtered easily?
○ a colloid, a heterogeneous mixture
○ a solution, a heterogeneous mixture
○ a colloid, a homogeneous mixture
○ a solution, a homogeneous mixture

Explanation:

1. Recall the properties of colloids: Colloids have particles that are large enough to scatter light (Tyndall effect) and small enough that they do not settle out and cannot be easily filtered.
2. Recall the classification of mixtures: Colloids are heterogeneous mixtures because the particles are not uniformly distributed at the molecular level (even though they may appear uniform to the naked eye, the particle size and distribution make them heterogeneous). Solutions have particles that are too small to scatter light and are homogeneous, and their particles can pass through filters. So the mixture that scatters light and cannot be filtered easily is a colloid, which is a heterogeneous mixture.

Answer:

a colloid, a heterogeneous mixture