1. Which one of the following methods is used to separate the colors in food dyes? *
a. winnowing
b. threshing
c. crystallization
d. chromatography

2. Choose the correct statement: *
a. Stirring slows down (decreases) the rate of dissolution
b. Grinding solids decreases their surface area of contact
c. Grinding solids speed up their rate of dissolution
d. Heating slows down (decreases) the rate of dissolution

3. What is the definition of a solvent? *
a. The substance that is dissolved.
b. The substance in which the solute is dissolved.
c. Unable to be dissolved.
d. Nothing happens

4. The solubility of solids depends on temperature. As temperature increases *
a. the solubility of most solid solutes drops to zero
b. the solubility of most solid solutes increases
c. the solubility of most solid solutes decreases

5. A liquid mixture in which particles can be seen and easily separated by settling or filtration is a *
a. solution
b. suspension
c. solvent
d. solute