University of Illinois, Chicago

CHEM 232

CHAPTER 12 ALKENES AND ALKYNES

MULTIPLE CHOICE

1)Which of the following is the characteristic feature of all alkenes?

1. 1. the presence of one or more carbon-carbon double bonds
   2. the presence of one or more carbon-carbon triple bonds
   3. the presence of at least one carbon-carbon double bond, and at least one carbon-carbon triple bond
   4. the presence of a ring system

                                           

 

2. Which of the following is the characteristic feature of all alkynes?
   1. the presence of one or more carbon-carbon double bonds
   2. the presence of one or more carbon-carbon triple bonds
   3. the presence of at least one carbon-carbon double bond, and at least one carbon-carbon triple bond
   4. the presence of a ring system

                                                                                      

 

3. Which class of compounds is not widespread in nature, and has little importance in biochemistry?

alkanes alkenes		c. d.	alkynes arenes

4. Which of the following compounds is a natural ripening agent for fruits?
   1. ethane                                                                       c.     acetylene
   2. ethylene                                                                    d. none of these

                                                                                      

 

5. Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain most hydrogen atoms?
   1. the alkane
   2. the alkene
   3. the alkyne
   4. None, they all contain the same number of hydrogen atoms.

                                           

 

6. Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms?
   1. the alkane
   2. the alkene
   3. the alkyne
   4. None, they all contain the same number of hydrogen atoms.

                                                                                      

 

7. Given a non-cyclic alkane, a non-cyclic alkene, and a non-cyclic alkyne, each of which contains six carbon atoms, which compound will contain the fewest hydrogen atoms?

1. 1. the alkane
   2. the alkene
   3. the alkyne
   4. It is not possible to tell, without knowing how many double and/or triple bonds are present in the unsaturated compounds.

                                           

 

8. Which organic compound is produced in the largest amount by the chemical industry?

acetylene benzene			c. d.	ethane ethylene

9.  

acetylene benzene   c. d. ethane methane

Which of the following is the starting material derived from natural gas that is used for the production of ethylene?

 

 

 

 

10. Which of the following is true of ethylene?
    1. It is not a very important industrial chemical.
    2. It is present in large amounts in natural gas.
    3. Its most important use is as a fuel.
    4. The vast majority of ethylene is produced by thermal cracking.

                                           

 

11. A bond angle of approximately 120? is associated with the carbons in which functional group?
    1. alkanes                                                                       c.     alkynes
    2. alkenes                                                                      d. none of these

                                           

 

 

12. A bond angle of 180? is associated with the carbons in which functional group?
    1. alkanes                                                                       c.     alkynes
    2. alkenes                                                                      d. arenes

                                           

 

 

13. Which of the following molecules has a linear structure?
    1. acetylene                                                                  c.     ethane
    2. benzene                                                                    d. ethylene

 

 

 

14. Which of the following is true of the six atoms of ethylene?
    1. Four atoms lie in the same plane, but two atoms are not in this plane.
    2. All six atoms lie in the same plane.
    3. The carbon atoms have a tetrahedral geometry so the C?C?H angles are approximately 109??
    4. none of the above

                                           

 

 

15. For which class of compounds does the lack of free rotation around carbon-carbon bonds result in the existence of cis-trans isomerism?
    1. alkanes                                                                       c.     alkynes
    2. alkenes                                                                      d. arenes

                                           

 

 

16. In alkenes there are four groups bonded to the carbons which constitute the carbon-carbon double bond. Which of the following situations produces cis-trans isomerism?
    1. when all four groups are the same
    2. when the two groups on one atom are the same, but the two groups on the other atom are different from each other and also different from the groups on the first atom
    3. when three of the four groups are the same, but the fourth group is different
    4. none of these results in the existence of cis-trans isomerism

 

 

 

17. In alkenes there are four groups bonded to the carbons which constitute the carbon-carbon double bond. Which of the following situations produces cis-trans isomerism?
    1. when all four groups are the same
    2. when the two groups bonded to each carbon atom are different from one another
    3. when three of the four groups are the same, but the fourth group is different
    4. None of these results in the existence of cis-trans isomerism.

                                           

 

 

18. Which of the following structural features is never associated with cis-trans isomerism?
    1. double bonds
    2. ring systems
    3. triple bonds
    4. None, they are all associated with cis-trans isomerism.

                                           

 

 

19. Cis-trans isomerism is associated with the presence of which of the following?
    1. double bonds                                                          c.     both a and b
    2. ring systems                                                             d. neither a nor b

                                           

 

 

20. Which of the following is true of cis and trans isomers?
    1. they have the same structural connectivity
    2. they have the same physical properties
    3. both a and b
    4. neither a nor b

 

 

 

21. Which of the following is true in the IUPAC system for naming alkenes?
    1. The alkene is named based on the longest carbon chain which contains the double bond.
    2. The position of the double bond is always given the highest possible number.
    3. The position and identity of substituents determines the number associated with the position of the double bond.
    4. None of the above is correct.

 

 

 

22. Which of the following is true in the IUPAC system for naming alkenes?
    1. The alkene is always named based on the longest carbon chain.
    2. The position of the double bond is always given the highest possible number.
    3. The position and identity of substituents determines the number associated with the position of the double bond.
    4. None of the above is correct.

 

 

 

23. Which of the following is true in the IUPAC system for naming alkenes?
    1. The alkene is always named based on the longest carbon chain.
    2. the position of the double bond is always given the lowest possible number.
    3. The position and identity of substituents determines the number associated with the position of the double bond.
    4. None of the above is correct.

                                           

 

 

24. Which of the following is true of the common names of low molecular weight alkenes and alkynes?
    1. The common names of all alkenes end in ?ene, and those of alkynes end in ?yne.
    2. The common names of all alkenes and all alkynes end in ?ene.
    3. the common names of all alkenes and all alkynes end in ?yne.
    4. None of the above is correct.

                                           

 

 

25. Which of the following is not a correct IUPAC name for an alkene?
    1. 2-methyl-1-butene
    2. 2-methyl-2-butene
    3. 2-methyl-3-butene
    4. None, these are all correct IUPAC names.

                                           

 

 

26. Which of the following is not a correct IUPAC name for an alkene?
    1. 1-methyl-1-butene                                               c.     3-methyl-1-butene
    2. 2-methyl-1-butene                                               d.   2-methyl-2-butene

 

 

27. Which of the following is not a correct IUPAC name for an alkene?
    1. 2-methyl-1-butene
    2. 2-methyl-2-butene
    3. 3-methyl-1-butene
    4. None, these are all correct IUPAC names.

 

 

 

28. What is the correct IUPAC name for the following compound?

1. 1. 2,2-dimethyl-4-pentene                                     c.     4,4-dimethyl-1-pentene
   2. 4,4-dimethyl-2-pentene                                     d. isoheptene

                                           

 

 

29. A student named a particular compound 2-propyl-1-butene. Assuming that the student's choice actually corresponded to the correct distribution of the double bond and the substituents, what is the correct IUPAC name for this compound?
    1. 2-propyl-1-butene                                                c.     3-methyl-2-pentene
    2. 2-ethyl-1-pentene                                                d. none of these

                                           

 

 

30. A student named a particular compound 2-ethyl-3-methyl-2-butene. Assuming that the student's choice actually corresponded to the correct distribution of the double bond and the substituents, what is the correct IUPAC name for this compound?
    1. 2-ethyl-3-methyl-2-butene                               c.     2,3-dimethyl-2-pentene
    2. 3,4-dimethyl-3-pentene                                     d.   2,3-dimethyl-1-pentene

                                           

 

 

31. A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called isobutylethene?
    1. 4-methyl-1-pentene                                            c.     3,3-dimethyl-1-butene
    2. 3-methyl-1-pentene                                            d. none of these

 

 

 

32. A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called sec- butylethene?
    1. 4-methyl-1-pentene                                            c.     3,3-dimethyl-1-butene
    2. 3-methyl-1-pentene                                            d. none of these

                                           

 

 

33. What is the correct IUPAC name for the following compound?

1. 1. 2-methyl-3-propyl-2-butene                            c.     2,3-dimethyl-2-hexene
   2. 1,1,2-trimethyl-1-pentene                                 d. none of these

                                           

 

 

34. What is the name of the lightest hydrocarbon which has cis and trans isomers?
    1. 1-butene                                                                   c.     1,2-dimethylcyclopropane
    2. 2-butene                                                                   d. propene

                                           

 

 

35. Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₃H₅Br?
    1. 1-bromopropene                                                   c.     3-bromopropene
    2. 2-bromopropene                                                   d. none of these

 

 

 

36. Cis-trans isomers do not exist for which of the following compounds, all of which have the molecular formula C₃H₄Br₂?
    1. 1,1-dibromopropene
    2. 1,2-dibromopropene
    3. 1,3-dibromopropene
    4. They do not exist for any of these three molecules.

 

 

 

37. Which of the following, all of which have the molecular formula C₅H₁₀, has cis and trans isomers?
    1. 2-methyl-1-butene                                               c.     2-pentene
    2. 2-methyl-2-butene                                               d. none of them

                                           

 

 

38. Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₅H₁₀?
    1. 1-pentene                                                                c.     2-methyl-2-butene
    2. 2-methyl-1-butene                                               d. 1,2-dimethylcyclopropane

 

 

 

39. Which of the following structures corresponds to cis-3-methyl-2-hexene
    1. c.

                                                                

1. 2. d.

                                                                

                                           

 

 

40. Which of the following compounds, all of which have the molecular formula C₆H₁₂, has cis and trans

isomers?

1. 1. 2-methyl-1-pentene                                            c.     3-methyl-2-pentene
   2. 2-methyl-2-pentene                                            d. They all have cis-trans isomers.

                                           

 

 

41. Which of the following compounds, all of which have the molecular formula C₆H₁₂, does not have cis

and trans isomers?

1. 1. 4-methyl-2-pentene
   2. 2-methyl-1-pentene
   3. 3-methyl-2-pentene
   4. None of them, they all have cis-trans isomers.

                                           

 

 

42. What is the correct IUPAC name for the following compound?

1. 1. trans-3-propyl-3-hexene                                    c.     trans-4-ethyl-3-heptene
   2. cis-3-propyl-3-hexene                                         d. cis-4-ethyl-3-heptene

 

 

 

43. What is the configuration of each of the alkenes shown below?

1. 1. (i) cis (ii) cis                                                               c.     (i) cis (ii) trans
   2. (i) trans (ii) trans                                                     d.   (i) trans (ii) cis

                                           

 

 

44. Stereoisomers exist for which of the following molecules, all of which have the molecular formula C₅H₈?
    1. 1,3-pentadiene                                                       c.     2-methyl-1,3-butadiene
    2. 1,4-pentadiene                                                       d. all of them

 

 

 

45. Including cis-trans isomers, how many different alkenes have the molecular formula C₄H₈?

1. 1. 2                                                                                    c.     4
   2. 3                                                                                    d.   5

                                           

 

 

46. Including cis-trans isomers, how many different alkenes have the molecular formula C₅H₁₀?
    1. 4                                                                                    c.     6
    2. 5                                                                                    d.   7

                                           

 

 

47. How many cycloalkenes have the molecular formula C₄H₆?
    1. 1                                                                                    c.     3
    2. 2                                                                                    d.   4

                                           

 

 

48. How many cycloalkenes have the molecular formula C₅H₈?
    1. 7                                                                                    c.     9

b.   8                                                                                    d. 10

                                           

 

 

49. Which of the following is not a correct IUPAC name?
    1. 3-methylcyclopentene                                        c.     5-methylcyclopentene
    2. 4-methylcyclopentene                                        d. None, they are all correct.

                                           

 

 

50. Which of the following is a correct IUPAC name?
    1. 4-ethyl-1-methylcyclohexene                          c.     1-methyl-4-ethylcyclohexene
    2. 5-ethyl-2-methylcyclohexene                          d.   5-methyl-2-ethylcyclohexene

 

 

 

51. Which of the following is not a correct IUPAC name?
    1. cis-2,3-dimethylcyclopentene                          c.     cis-3,5-dimethylcyclopentene
    2. cis-3,4-dimethylcyclopentene                          d. None, they are all correct.

 

 

 

52. Cis-trans isomers exist for which of the following?
    1. 1,2-dimethylcyclopentene                                 c.     3,5-dimethylcyclopentene
    2. 2,3-dimethylcyclopentene                                 d. All of them exist.

                                           

 

 

53. How many stereoisomers are possible for 1,4-heptadiene?

1. 1. 2                                                                                    c.     7
   2. 4                                                                                    d.   8

 

 

 

54. How many stereoisomers are possible for 2,4-heptadiene?
    1. 2                                                                                    c.     7
    2. 4                                                                                    d.   8

                                           

 

 

55. How many stereoisomers are possible for 1,4,7-octatriene?
    1. 2                                                                                    c.     8

b.   4                                                                                    d. 16

 

 

 

56. How many stereoisomers are possible for 1,4,6-octatriene?
    1. 2                                                                                    c.     8

b.   4                                                                                    d. 16

                                           

 

 

57. How many stereoisomers are possible for 2,4,6-nonatriene?
    1. 2                                                                                    c.     8

b.   4                                                                                    d. 16

                                           

 

 

58. Which of the following is true of the non-cyclic portion of vitamin A?
    1. It contains 4 double bonds, all in the cis configuration.
    2. It contains 4 double bonds, all in the trans configuration.
    3. It contains 4 double bonds, which alternate cis, trans, cis, trans.
    4. None of the above is true.

                                           

 

 

59. Which of the following occurs when rhodopsin absorbs light?
    1. The less stable 11,12-cis isomer is converted to the more stable trans isomer.
    2. the less stable 11,12-trans isomer is converted to the more stable cis isomer.
    3. The more stable 11,12-cis isomer is converted to the less stable trans isomer.
    4. The more stable 11,12-trans isomer is converted to the less stable cis isomer.

 

 

 

60. Based on your knowledge of the properties of the analogous alkanes, which of the following is the lightest alkene that you would expect to be a liquid at room temperature?
    1. propene                                                                    c.     1-heptene
    2. 1-pentene                                                                d. 1-nonene

                                           

 

 

61. Of the following alkenes, all of which have the molecular formula C₅H₁₀, which would you expect to have the highest boiling point?
    1. 4-methyl-1-pentene                                            c.     2,3-dimethyl-2-butene
    2. 4-methyl-2-pentene                                            d. 2-hexene

 

 

 

62. Which of the following alkenes, all of which have the molecular formula C₅H₁₀, would you expect to have the lowest boiling point?
    1. 4-methyl-1-pentene                                            c.     2,3-dimethyl-2-butene
    2. 4-methyl-2-pentene                                            d. 2-hexene

                                           

 

 

63. Which of the following statements is true about the solubility of alkenes?
    1. All alkenes are soluble in water.
    2. Long chain alkenes are soluble in water, but short chain alkenes are insoluble.
    3. Long chain alkenes are insoluble in water, but short chain alkenes are soluble.
    4. All alkenes are soluble in alkanes.

ANS: D

 

 

64. Which of the following correctly characterizes the compound represented below?

 

 

 

 

1. 1. trans isomer                                                             c.     at least one 120° bond angle
   2. alkyne                                                                         d. free rotation around all bonds

                                           

 

 

65. Consider the molecule represented below.

 

 

 

 

Which of the following is a characteristic of the substance represented here?

1. 1. alkene

1. 2. cis isomer
   3. melting point different than

 

 

 

 

 

 

 

1. 4. All of these are characteristic of this compoun

 

 

66. Consider the alkyne counterpart of the following compound.

 

 

 

Which of the following would characterize this alkyne?

1. 1. C₃H₆
   2. CH₃C CH c.

4. both a and b
5. a, b and c

                                           

 

 

67. Examine the following reaction.

 

 

 

A                                    B                                          C

 

Which of the following describes this reaction?

1. 1. Involves a secondary carbocation.
   2. A represents the nucleophile.
   3. B represents the electrophile.
   4. Produces a new carbon to carbon bon
   5. All of the above except d are correct.

 

 

68. Consider the substance represented by the following model.

 

The physical properties of this substance would most closely represent the corresponding member which functional group class?

1. 1. alkyne                                                                         c.     aldehyde
   2. alcohol                                                                        d. carboxylic acid

 

 

 

69. What is the product of the reaction of the substance given below with hydrogen?

 

 

 

 

1. 1. butyne                                                                       c.     trans-butene
   2. cis-butane                                                                 d. butane

 

 

 

70. When the following substance reacts with water in the presence of an acid, which of the following describes the reaction?

 

 

 

 

1. 1. Two products are produced.
   2. The product is an alcohol.
   3. both a and b
   4. neither a nor b

                                           

 

 

71. Which of the following is the most characteristic reaction of alkenes?

1. 1. addition                                                                     c.     reduction
   2. oxidation                                                                   d. substitution

 

 

 

72. Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?
    1. hydrogenation                                                        c.     both a and b
    2. hydrobromination                                                 d. neither a nor b

 

 

 

73. Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?
    1. hydration                                                                  c.     both a and b
    2. hydrogenation                                                        d. neither a nor b

                                           

 

 

74. Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?
    1. bromination                                                             c.     both a and b
    2. hydrogenation                                                        d. neither a nor b

                                           

 

 

75. Which of the following reactions involves the addition of different groups to the two ends of a double bond?
    1. hydrogenation                                                        c.     both a and b
    2. hydrobromination                                                 d. neither a nor b

                                           

 

 

76. Which of the following reactions involves the addition of different groups to the two ends of a double bond?
    1. hydration                                                                  c.     both a and b
    2. hydrogenation                                                        d. neither a nor b

 

 

 

77. Which of the following reactions involves the addition of different groups to the two ends of a double bond?
    1. bromination                                                             c.     both a and b
    2. hydrogenation                                                        d. neither a nor b

 

 

 

78. Which of the following curved arrows correctly describes the first step of the reaction of propene with a hydrogen halide?

1. 1. c.

                                            

1. 2. d. None of these are correct.

                                           

 

 

79. Which of the following curved arrows correctly describes the second step in the reaction of propene with hydrogen bromide?

a.

b.

c.

d.

 

 

 

80. Markovnikov's rule is not useful for predicting the outcome of the reaction of hydrogen chloride with which of the following alkenes?
    1. 1-butene                                                                   c.     2-methylpropene
    2. 2-butene                                                                   d. 1-pentene

                                           

 

 

81. Markovnikov's rule is useful to predict the outcome of the reaction of hydrogen chloride with which of the following alkenes?
    1. 1-butene                                                                   c.     both a and b
    2. 2-butene                                                                   d. neither a nor b

 

 

 

82. Markovnikov’s rule is useful in predicting the outcome for which of the following addition reactions of unsymmetrical alkenes?
    1. hydration                                                                  c.     both a and b
    2. bromination                                                             d. neither a nor b

 

 

 

83. Which of the listed products will be formed in the following reaction?

1. 1. c.

                                                               

1. 2. d.

                                                               

                                           

 

 

84. Which of the listed products will be formed in the following reaction?

1. 1. c.

                                                                    

1. 2. d.

                                                                          

                                           

 

 

85. Which of the listed products will be formed in the following reaction?

1. 1. c.

                                                                    

1. 2. d.

                                                                    

 

 

 

86. What product is obtained by the hydrobromination of 2-methyl-1-pentene?
    1. 1-bromo-2-methylpentane                               c.     2,3-dibromo-2-methylpentane
    2. 2-bromo-2-methylpentane                               d.   3,3-dibromo-2-methylpentane

                                           

 

 

87. What product is obtained by the hydrobromination of 2-methyl-2-pentene?
    1. 3-bromo-2-methylpentane                               c.     2,3-dibromo-2-methylpentane
    2. 2-bromo-2-methylpentane                               d.   3,3-dibromo-2-methylpentane

                                           

 

 

88. Which of these carbocations is generated as an intermediate in the following reaction?

1. 1. c.

                                                                    

1. 2. d. none of the above

                                           

 

 

89. What is the charge on the organic intermediate formed during hydrohalogenation? a.        ?2                                                                                 c.     +1

b.   ?1                                                                                 d. +2

                                           

 

 

90. What type of alcohol is formed by the hydration of 1-butene?
    1. primary
    2. secondary
    3. tertiary
    4. None of these, the product is not an alcohol.

                                           

 

 

91. What type of alcohol is formed by the hydration of 2-butene?
    1. primary
    2. secondary
    3. tertiary
    4. None of these, the product is not an alcohol.

                                           

 

 

92. What type of alcohol is formed by the hydration of 2-methyl-2-butene?
    1. primary
    2. secondary

1. 3. tertiary
   4. None of these, the product is not an alcohol.

                                           

 

 

93. What type of alcohol is formed by the hydration of 1-pentene?
    1. primary
    2. secondary
    3. tertiary
    4. None of these, the product is not an alcohol.

                                           

 

 

94. What type of alcohol is formed by the hydration of 2-methyl-1-pentene?
    1. primary
    2. secondary
    3. tertiary
    4. None of these, the product is not an alcohol.

                                           

 

 

95. Which alcohol is formed by the hydration of 2-methyl-2-pentene?
    1. c.

                                                                     

1. 2. d.

                                                                   

                                           

 

 

96. What type(s) of intermediates is/are generated during the acid-catalyzed hydration of an alkene?
    1. an oxonium ion                                                       c.     both a and b
    2. a carbocation                                                           d. neither a nor b

                                           

 

 

97. How many valence electrons are associated with the positively charged carbon in a carbocation?
    1. 4                                                                                    c.     7
    2. 6                                                                                    d.   8

                                           

 

 

98. Which product is formed by the chlorination of 2-butene?
    1. 2-chlorobutane                                                       c.     2,3-dichlorobutane
    2. 2,2-dichlorobutane                                               d. 1,2-dichlorobutane     

 

 

99. Which product is formed by the chlorination of 2-methyl-1-butene?
    1. 1,1-dichloro-2-methylbutane                           c.     2-chloro-2-methylbutane
    2. 1,2-dichloro-2-methylbutane                           d.   1-chloro-2-methylbutane

                                           

 

 

100. Which product is formed by the bromination of cyclohexene?
     1. c.

                                                                       

1. 2. d.

                                                                        

 

 

 

101. Which of the following is another name for hydrogenation?
     1. hydrolysis                                                                  c.     reduction
     2. hydration                                                                  d.   oxidation

                                           

 

 

102. Which of the following compounds will not produce methylcyclopentane after catalytic hydrogenation?
     1. c.

                                                                     

1. 2. d.

                                                                     

                                           

 

 

103. Which of the following reactions requires a transition metal catalyst?
     1. halogenation                                                           c.     hydrogenation
     2. hydrohalogenation                                               d. hydration

                                           

 

 

104. In which of the following types of reactions is sulfuric acid used as a catalyst?
     1. halogenation                                                           c.     hydrogenation
     2. hydrohalogenation                                               d. hydration

 

 

105. The formation of polyethylene is an example of which of the following?
     1. chain-growth polymerization                            c.     step-growth polymerization
     2. oxidative polymerization                                    d. none of these

 

 

 

106. The polymer Teflon contains what sorts of bonds?
     1. C–C and C–H bonds                                              c.     C=C and C–F bonds
     2. C–C and C–F bonds                                               d.   C=C and C–H bonds

                                           

 

 

107. Which of the following is used as the notation for the repeat unit of polypropylene?
     1. 
        CH₂=CH?CH₃                                                            c.
     2. d. none of these

 

 

                                           

 

 

108. Which of the following monomers can be used to prepare the polymer given below?

 

1. 1. cis-1-bromopropene                                            c.     both a and b
   2. trans-1-bromopropene                                       d. neither a nor b

                                           

 

109. Which of the following monomers can be used to prepare the polymer given below?

 

1. 1. trans-1-bromopropene                                       c.     both a and b
   2. 2-bromopropene                                                   d. neither a nor b

 

 

 

110. Which of the following monomers can be used to prepare polystyrene?
     1. c.
     2. d.

                                           

 

 

111. Which of the following is the monomer used to prepare the polymer given below?

 

1. 1. trans-1-bromopropene                                       c.     3-bromopropene
   2. 2-bromopropene                                                   d. none of these

                                           

 

 

112. Which of the following is the monomer used to prepare the polymer given below?

 

1. 1. trans-1-bromopropene                                       c.     3-bromopropene
   2. 2-bromopropene                                                   d. none of these

                                           

 

 

113. Chloroprene, which is the monomer used to make neoprene rubber, is one of several monochloro derivatives of 1,3-butadiene. How many monochloro derivatives of 1,3-butadiene are there? (Be sure to account for cis-trans isomers.)
     1. 2                                                                                    c.     4
     2. 3                                                                                    d.   5

                                           

 

 

114. Low-density polyethylene is produced from ethylene by using which of the following?
     1. peroxide initiators                                                 c.     either a or b
     2. Ziegler-Natta catalysis                                          d. neither a nor b

 

 

 

115. High-density polyethylene is produced from ethylene by using which of the following?
     1. peroxide initiators                                                 c.     either a or b
     2. Ziegler-Natta catalysis                                          d. neither a nor b

                                           

 

 

116. Which of the following is a representation of a portion of the polystyrene chain? a.

b.

c.

d.

                                           

 

 

117. Currently there is extensive recycling of which of the following polymers?
     1. low-density polyethylene                                  c.     poly(vinyl chloride)
     2. polystyrene                                                              d. none of these

 

 

 

118. Currently there is extensive recycling of which of the following polymers?
     1. high-density polyethylene                                 c.     poly(vinyl chloride)
     2. polystyrene                                                              d. none of these

 

 

 

119. Currently there is extensive recycling of which of the following polymers?
     1. high-density polyethylene                                 c.     both a and b
     2. low-density polyethylene                                  d. neither a nor b

 

 

 

120. Currently there is extensive recycling of which of the following polymers?
     1. high-density polyethylene                                 c.     both a and b
     2. polystyrene                                                              d. neither a nor b

 

 

 

121. Which of the following alkenes undergoes acid-catalyzed hydration to give 1-methylcyclopentanol?

1. 1. c.

                                                                     

1. 2. d. None of these alkenes.

 

 

 

122. Examine the following reaction;

 

 

 

 

This reaction occurs in which step of the hydrohalogenation reaction mechanism?

1. 1. 1
   2. 2
   3. 3

                                           

 

 

 

 

123. To which pattern does the following reaction belong?

 

 

 

 

1. 1. 1                                                                                    c.     3
   2. 2                                                                                    d.   4

                                           

 

 

124. To which pattern does the following reaction belong?

 

 

 

 

1. 1. 1                                                                                    c.     3
   2. 2                                                                                    d.   4