3. Name the following compound using the IUPAC nomenclature system.

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1 CHEM 102 Winter 07 Exam 1 On the answer sheet (scantron) write your Name, Student ID Number, and Recitation Section Number. Choose the best (most correct) answer for each question AND ENTER IT ON YOUR ANSWER SHEET. 1. The rating of the ability of a gasoline to burn smoothly in an internal combustion is its a. boiling point. b. fuel density. c. molar mass. d. octane number. 2. Greenhouse gases in the atmosphere contribute to global warming mainly by a. absorbing ultraviolet light energy from the sun and storing it as molecular vibrations. b. absorbing infrared light energy from the sun and storing it as molecular vibrations. c. absorbing ultraviolet light energy from the earth and storing it as molecular vibrations. d. absorbing infrared light energy from the earth and storing it as molecular vibrations. 3. Name the following compound using the IUPAC nomenclature system. a. 3-methyl-2-pentene b. 2-ethylbutane c. 2-ethyl-2-butene d. 3-methyl-3-pentene Answer: a 4. Consider the carbon skeleton shown below. To form a primary alcohol, the functional group can be bonded to which carbon atom(s)? a. 2 or 6 b. 3, 5, or 6 1 C c. 1, 2, or 7 d. any of them C C C C C C

2 5. Which alkane will have the highest boiling point? a. methane b. propane c. heptane d. decane 6. Which of the following are constitutional (or structural) isomers? a. CH 2 O and C 6 H 12 O 6 b. C 2 H 5 OH and CH 3 OCH 3 c. C 2 H 4 and C 2 H 6 d. C 6 H 5 OH and C 6 H 4 (OH) 2 7. Which statement about constitutional (or structural) isomers is true? a. Constitutional isomers have different physical properties. b. Constitutional isomers have different molecular formulas. c. Constitutional isomers have the same chemical properties. d. Constitutional isomers only occur among straight chain compounds. 8. Assume all hydrocarbons given are linear. Which compound will contain a double bond? a. C 3 H 6 c. C 2 H 2 d. CH 4 e. C 5 H Determine the formula for a linear alkane, alkene and alkyne (in that order) containing 4 carbons. a. C 4 H 8 C 4 H 6 C 4 H 4 b. C 4 H 10 C 4 H 8 C 4 H 6 c. C 4 H 10 C 4 H 9 C 4 H 8 d. C 4 H 12 C 4 H 10 C 4 H Which of the following compounds can exhibit cis-trans isomerism? a. CH 2 =CH 2 b. CH 3 CH 3 c. ClHC=CHCl d. Cl 2 C=CH 2

3 11. Which of the following is a chiral molecule or is associated with chiral molecules? a. methane b. molecules that are superimposable on their mirror images c. ethylene d. bromochlorofluoromethane (BrClFCH) 12. A portion of a polymer strand is -(CH 2 -CH 2 -CH 2 -)-. What monomer was used to synthesize this polymer? a. ethane b. propane c. methane d. ethylene 13. Which of the following compounds represents a para isomer? a. b. c. d.

4 14. Which of the following compounds is an ester? a. b. c. d. 15. Which statement about heat of vaporization and heat of condensation is correct? a. The heat of condensation is equal in magnitude but opposite in sign when compared to the heat of vaporization. b. The heat of vaporization represents the heat released when a gas becomes a liquid, and the heat of condensation represents the heat required for a liquid to become a gas. c. There is no general relationship between these two quantities and the values depend on the substance involved. d. The heat of vaporization is always less than the heat of condensation. 16. Which pair of compounds could form a condensation copolymer? a. H 2 C=CH 2 H 2 C=CHCH 3 b. H 2 C=CHCH=CH 2 c. H 2 NCH 2 CH 2 NH 2

5 d. H 2 C=CHCH When a liquid boils, a. the liquid molecules bonds break. b. air bubbles escape from the liquid. c. the vapor pressure of the liquid is less than atmospheric pressure. d. the vapor is made up of the same kind of molecules as the liquid. 18. The normal boiling point of a liquid on a vapor pressure curve is found a. at the point where the temperature is equal to the pressure. b. at any point where the pressure is less than 760 mm Hg. c. at the point where the temperature line crosses the 760 mm Hg line. d. in the region below the curve. 19. Which group includes only endothermic processes? a. freezing, vaporization, deposition b. freezing, condensation, deposition c. melting, evaporation, sublimation d. melting, condensation, sublimation 20. The transition from Phase I to Phase II is called a. melting. b. freezing. c. evaporation. d. condensation.