Question 1

A bond angle of approximately 120° is associated with the carbons in which functional group?

Accepted Answer

A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  none of these 
A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  none of these

Question 2

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?

Accepted Answer

A)  4-methyl-1-pentene 
B)  3-methyl-1-pentene 
C)  3,3-dimethyl-1-butene 
D)  none of these 
A)  4-methyl-1-pentene 
B)  3-methyl-1-pentene 
C)  3,3-dimethyl-1-butene 
D)  none of these

Question 3

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

Accepted Answer

A)  trans-1-bromopropene 
B)  2-bromopropene 
C)  3-bromopropene 
D)  none of these 
A)  trans-1-bromopropene 
B)  2-bromopropene 
C)  3-bromopropene 
D)  none of these

Question 4

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

Accepted Answer

A)  acetylene 
B)  benzene 
C)  ethane 
D)  ethylene 
A)  acetylene 
B)  benzene 
C)  ethane 
D)  ethylene

Question 5

The polymer Teflon contains what sorts of bonds?

Accepted Answer

A)  C-C and C-H bonds 
B)  C-C and C-F bonds 
C)  C=C and C-F bonds 
D)  C=C and C-H bonds 
A)  C-C and C-H bonds 
B)  C-C and C-F bonds 
C)  C=C and C-F bonds 
D)  C=C and C-H bonds

Question 6

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

Accepted Answer

A)  2 
B)  4 
C)  7 
D)  8 
A)  2 
B)  4 
C)  7 
D)  8

Question 7

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C5H10?

Accepted Answer

A)  1-pentene 
B)  2-methyl-1-butene 
C)  2-methyl-2-butene 
D)  1,2-dimethylcyclopropane 
A)  1-pentene 
B)  2-methyl-1-butene 
C)  2-methyl-2-butene 
D)  1,2-dimethylcyclopropane

Question 8

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?

Accepted Answer

A)  the alkane 
B)  the alkene 
C)  the alkyne 
D)  It is not possible to tell, without knowing how many double and/or triple bonds are present in the unsaturated compounds. 
A)  the alkane 
B)  the alkene 
C)  the alkyne 
D)  It is not possible to tell, without knowing how many double and/or triple bonds are present in the unsaturated compounds.

Question 9

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?

Accepted Answer

A)  2-propyl-1-butene 
B)  2-ethyl-1-pentene 
C)  3-methyl-2-pentene 
D)  none of these 
A)  2-propyl-1-butene 
B)  2-ethyl-1-pentene 
C)  3-methyl-2-pentene 
D)  none of these

Question 10

Currently there is extensive recycling of which of the following polymers?

Accepted Answer

A)  high-density polyethylene 
B)  polystyrene 
C)  both a and b 
D)  neither a nor b 
A)  high-density polyethylene 
B)  polystyrene 
C)  both a and b 
D)  neither a nor b

Question 11

Cis-trans isomerism is associated with the presence of which of the following?

Accepted Answer

A)  double bonds 
B)  ring systems 
C)  both a and b 
D)  neither a nor b 
A)  double bonds 
B)  ring systems 
C)  both a and b 
D)  neither a nor b

Question 12

Which alcohol is formed by the hydration of 2-methyl-2-pentene?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 13

Which of the following is true of cis and trans isomers?

Accepted Answer

A)  they have the same structural connectivity 
B)  they have the same physical properties 
C)  both a and b 
D)  neither a nor b 
A)  they have the same structural connectivity 
B)  they have the same physical properties 
C)  both a and b 
D)  neither a nor b

Question 14

Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?

Accepted Answer

A)  bromination 
B)  hydrogenation 
C)  both a and b 
D)  neither a nor b 
A)  bromination 
B)  hydrogenation 
C)  both a and b 
D)  neither a nor b

Question 15

What product is obtained by the hydrobromination of 2-methyl-2-pentene?

Accepted Answer

A)  3-bromo-2-methylpentane 
B)  2-bromo-2-methylpentane 
C)  2,3-dibromo-2-methylpentane 
D)  3,3-dibromo-2-methylpentane 
A)  3-bromo-2-methylpentane 
B)  2-bromo-2-methylpentane 
C)  2,3-dibromo-2-methylpentane 
D)  3,3-dibromo-2-methylpentane

Question 16

Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?

Accepted Answer

A)  hydrogenation 
B)  hydrobromination 
C)  both a and b 
D)  neither a nor b 
A)  hydrogenation 
B)  hydrobromination 
C)  both a and b 
D)  neither a nor b

Question 17

For which class of compounds does the lack of free rotation around carbon-carbon bonds result in the existence of cis-trans isomerism?

Accepted Answer

A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  arenes 
A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  arenes

Question 18

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

Accepted Answer

A)    
B)    
C)    
D)  None of these alkenes. 
A)    
B)    
C)    
D)  None of these alkenes.

Question 19

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?

Accepted Answer

A)  when all four groups are the same 
B)  when the two groups bonded to each carbon atom are different from one another 
C)  when three of the four groups are the same, but the fourth group is different 
D)  None of these results in the existence of cis-trans isomerism. 
A)  when all four groups are the same 
B)  when the two groups bonded to each carbon atom are different from one another 
C)  when three of the four groups are the same, but the fourth group is different 
D)  None of these results in the existence of cis-trans isomerism.

Question 20

Which of the following statements is true about the solubility of alkenes?

Accepted Answer

A)  All alkenes are soluble in water. 
B)  Long chain alkenes are soluble in water, but short chain alkenes are insoluble. 
C)  Long chain alkenes are insoluble in water, but short chain alkenes are soluble. 
D)  All alkenes are soluble in alkanes. 
A)  All alkenes are soluble in water. 
B)  Long chain alkenes are soluble in water, but short chain alkenes are insoluble. 
C)  Long chain alkenes are insoluble in water, but short chain alkenes are soluble. 
D)  All alkenes are soluble in alkanes.

Exam 12: Alkenes and Alkynes

A bond angle of approximately 120° is associated with the carbons in which functional group?

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?

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

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

The polymer Teflon contains what sorts of bonds?

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

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C5H10?

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?

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?

Currently there is extensive recycling of which of the following polymers?

Cis-trans isomerism is associated with the presence of which of the following?

Which alcohol is formed by the hydration of 2-methyl-2-pentene?

Which of the following is true of cis and trans isomers?

Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?

What product is obtained by the hydrobromination of 2-methyl-2-pentene?

Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?

For which class of compounds does the lack of free rotation around carbon-carbon bonds result in the existence of cis-trans isomerism?

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

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?

Which of the following statements is true about the solubility of alkenes?

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Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₅H₁₀?