5-2 Differentiate solution, colloids, suspensions, and coarse mixtures

5-2-1. If a medicine bottle has a "shake well before using" label, it most likely contains......
A. a solution, B. a colloid, C. a suspension

5-2-2. Which of the following is a coarse mixture?
A. air, B. 18K gold, C. gasoline, D. salad