1. Which of the following is considered as pure substance?
A. Mineral water
B. Tap water
C. Seawater
D. Distilled water

2. The following are properties of pure substance EXCEPT :
A. It has a definite boiling point
B. It has a definite melting point
C. It has a definite composition.
D. It has a definite appearance.

3. After boiling water from your faucet, you observed that there are white, chalk-like residue in the kettle. This observation proved that water from the faucet is an example of _____.
A. Pure substance
B. Mixture
C. Element
D. Neither pure substance or mixture.

4. Why is a solution considered a homogeneous mixture?
A. It is usually a liquid.
B. It can be saturated or supersaturated. C. It contains a solute and solvent.
D. Its components are distributed evenly and it appears clear.

5. All of the following describes a solution EXCEPT:
A. Clear
B. Homogeneous
C. Light can pass through
D. Can be separated by filtration.

6. A solution that contains less solute it can hold at a given temperature.
A. Unsaturated
B. Saturated
C. Dilute
D. Concentrated

7. The two components of ra solution are solute and solvent. Which statement describes the solute?
A. It is the solid formed in the solution.
B. It is the liquid component of the solution.
C. It is the component of a solution in smaller quantity.
D. It is the component of a solution in bigger quantity.

8. When we buy concentrated solutions, how do we describe its components? A. The solute is less than the amount of solvent.
B. The solute is greater than the amount of solvent.
C. The solute and solvent have equal amounts.
D. Water is added to the mixture.

9. Antiseptics are used widely as an antimicrobial agent. One of its major component is citric acid. How many % citric acid is present in a 250 mL bottle of an antiseptic if 150 mL of solvent is used? A. 0.400 %
B. 40.0%
C. 50.0%
D. 60.0%

10. Some pharmaceutical medicines are labeled in % concentration. Why is there a need to label this drugs?
A. To inform the person buying the product.
B. To avoid accidents of overdosing or underdosing.
C. To adhere to the rules of the Bureau of Food and Drugs.
D. All of these are correct. ​​