Question

brownian motion is not observed in a mixture that includes two phases. which best identifies the mixture? a colloid a suspension a solution an alloy

Explanation:

Colloids show Brownian motion. Solutions are homogeneous and don't have two - phase visible separation. Alloys are homogeneous mixtures. Suspensions are mixtures with two phases where particles are large enough to settle out and Brownian motion is not observed.

Answer:

B. a suspension