1. What properties distinguish pure substances from mixtures?  A. can be separated by physical means B. consist of two or more kinds of matter C. have no specific solubility and densities D. have constant boiling point temperature and melting temperature

2. Soil is composed of small pieces of a variety of materials. In which of the following would soil be classified?  A. solution B. pure Substances C. homogeneous mixture D. heterogeneous mixture

3. Why is a solution homogeneous? A. It is usually liquid. B. It contains a solute and solvent. C. It can be diluted or concentrated. D. Its components are distributed evenly in all proportions.

4. Which of the following statements does NOT describe a compound? A. They are unique substances. B. They are always homogeneous in nature. C. It can only be separated by chemical means. D. They are formed by physically mixing two or more substances.

5. There are some antibiotics that need to be shaken before use. Which type of mixture do they belong to? A. colloid        B. solution        C. suspension        D. homogenous

6. Which of the following is formed when solute is mixed with solvent? A. liquid        B. solid            C. solution        D. solvent

7. Which of the following BEST describes a solvent? A. A mixture of different substances. B. The substance that is present in small amounts. C. The substance that is being dissolved in a solution. D. The substance that does the dissolving in a solution

8. In a saltwater solution, what substance is considered the solvent? A. Salt B. Water C. Both are solvents D. Neither substance is a solvent.

9. Seawater is an example of a mixture because it is the same throughout. A. concentrated B. Heterogeneous C. Homogeneous D. Saturated

10. A solution is also known as a homogeneous mixture. Which of the following is an example of solutions?  A. Fruit Salad        B. Juice    C. Milk and Cereal        D. Water

11. What happens when you add more solvent to a given amount of solute? A. The solution will become diluted. B. The solution will become concentrated. C. The solution will become more saturated. D. The solution will become supersaturated.

12. Which of the following samples can be considered as a concentrated solution of Povidone Iodine, an antiseptic for minor wounds? A. 3 drops of Povidone Iodine dissolved in 100 ml of water. B. 5 drops of Povidone Iodine dissolved in 100 ml of water. C. 10 drops of Povidone Iodine dissolved in 100 ml of water. D. 50 drops of Povidone Iodine dissolved in 100 ml of water.

13. A bottle of mouthwash must be diluted using this ratio of 1 cup of the solution:150 ml of solvent. What should you do to dilute the mouthwash? A. Mix 1cup of mouthwash solution in 1 cup of water. B. Mix 150 ml of mouthwash solution in 1 cup of water. C. Mix 1 cup of mouthwash solution in 150 ml of water. D. Mix 150 ml of water in 150 ml of mouthwash solution.

14. A 100-gram sample of sodium chloride aqueous solution has 5% solute.
What is the mass of water?  A. 5 g B. 95 g C. 100 g D. Cannot be determined

15. If you increase the volume of water in a vinegar solution, what will happen to the concentration of the vinegar solution? A. It will increase. B. It will decrease. C. It will not change. D. Either A or B. ​