INSTRUCTION: The student will answer the following questions.
1. Which of the following properties affects the melting and boiling points of molecules?
a. mass
b. color
c. volume
d. polarity
2. Which of the following refers to the temperature at which a solid turn into a liquid?
a. polarity
b. solubility
c. boiling point
d. melting point
3. Which of the following is insoluble in water?
a. isopropyl alcohol
b. benzene
c. ammonia
d. sucrose
4. Which of the following refers to the temperature at which a liquid turns into a gas?
a. boiling point
b. melting point
c. polarity
d. solubility
5. Water and oil will not mix because water is, and oil is.
a. polar; nonpolar
b. nonpolar; polar
c. polar; polar
d. nonpolar; nonpolar
6. Which of the following is soluble in water?
a. C6H14
b.CH4
c. C2H6
d. HCL
7. Which of the following is soluble in water?
a. water and sugar
b. water and margarine
c. water and alcohol
d. water and ammonia
8. Which of the following substances has the highest boiling point?
a. methane,
b. carbon dioxide,
c. carbon tetrachloride,
d. isopropyl alcohol,
9. Which of the following will happen when octane (C8H18) and sulfuric acid (H2SO4) are heated separately at the same time?
a. Octane will not boil, but sulfuric acid will.
b. Octane and sulfuric acid will boil at the same temperature.
c. Octane will boil at a lower temperature than sulfuric acid. d. Octane will boil at a higher temperature than sulfuric acid.
10. Which of the following will happen when citric acid is mixed with water in a container?
a. The citric acid will crystallize and settle at the bottom of the container.
b. A water layer will float on top of the citric acid layer.
c. A citric acid layer will float on top of the water layer.
d. The citric acid will dissolve in water.