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21. Petroleum is believed to have formed mostly from the anaerobic 31. A protein is a polymer formed from the linking of many
decomposition of buried a. glucose units.
a. dinosaurs. b. DNA molecules.
b. fish. c. amino acid molecules.
c. pine trees. d. monosaccharides.
d. plankton and algae. 32. Which of the following is not converted to blood sugar by the
22. The label on a container states that the product contains human body?
“petroleum distillates.” Which of the following hydrocarbons is a. Lactose
probably present? b. Dextrose
a. CH 4 c. Cellulose
b. C 5 H 12 d. None of the above is correct.
c. C 16 H 34 33. Fats from animals and oils from plants have the general structure
d. C 40 H 82 of a (an)
23. The reaction of C 2 H 2 + Br 2 → C 2 H 2 Br 2 is a (an) a. aldehyde.
a. substitution reaction. b. ester.
b. addition reaction. c. amine.
c. addition polymerization reaction. d. ketone.
d. substitution polymerization reaction. 34. Liquid oils from plants can be converted to solids by adding what
24. Ethylene molecules can add to one another in a reaction to form to the molecule?
a long chain called a a. Metal ions
a. monomer. b. Carbon
b. dimer. c. Polyatomic ions
c. trimer. d. Hydrogen
d. polymer. 35. The basic difference between a monomer of polyethylene and a
25. Chemical reactions usually take place on an organic compound monomer of polyvinyl chloride is
at the site of a a. the replacement of a hydrogen by a chlorine.
a. double bond. b. the addition of four fluorines.
b. lone pair of electrons. c. the elimination of double bonds.
c. functional group. d. the removal of all hydrogens.
d. Any of the above is correct. 36. Many synthetic polymers become a problem in the environment
26. The R in ROH represents because they
a. a functional group. a. decompose to nutrients, which accelerates plant growth.
b. a hydrocarbon group with a name ending in -yl. b. do not readily decompose and tend to accumulate.
c. an atom of an inorganic element. c. do not contain vitamins as natural materials do.
d. a polyatomic ion that does not contain carbon. d. become a source of food for fish but ruin the flavor of fish meat.
27. The OH in ROH represents 37. Which of the following terms does not describe an alkane?
a. a functional group. a. Paraffin
b. a hydrocarbon group with a name ending in -yl. b. Single bonds
c. the hydroxide ion, which ionizes to form a base. c. Double bonds
d. the site of chemical activity in a strong base. d. Straight chain
28. What is the proof of a “wine cooler” that is 5 percent alcohol by 38. A straight chain alkane with four carbons is called
volume? a. butane.
a. 2.5 proof b. tetraalkane.
b. 5 proof c. quatrane.
c. 10 proof d. propane.
d. 50 proof 39. What is the general formula for alkenes?
29. An alcohol with two hydroxyl groups per molecule is called a. C n H 2n+2
a. ethanol. b. C n H 2n+4
b. glycerol. c. C n H 2n
c. glycerin. d. C n H 2n–2
d. glycol. 40. An organic molecule that does not contain the maximum
30. A bottle of wine that has “gone bad” now contains number of hydrogen atoms is called
a. CH 3 OH. a. deficient.
b. CH 3 OCH 3 . b. unsaturated.
c. CH 3 COOH. c. saturated.
d. CH 3 COOCH 3 . d. incomplete.

320 CHAPTER 12 Organic Chemistry 12-22