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:

Colloids are heterogeneous mixtures that scatter light (Tyndall effect) and cannot be filtered easily as the particles are too small to be retained by ordinary filters. Solutions are homogeneous mixtures and do not scatter light significantly.

Answer:

a colloid, a heterogeneous mixture