Question 1

Which of the following reactions requires a transition metal catalyst?

Accepted Answer

A)  halogenation 
B)  hydrohalogenation 
C)  hydrogenation 
D)  hydration 
A)  halogenation 
B)  hydrohalogenation 
C)  hydrogenation 
D)  hydration

Question 2

High-density polyethylene is produced from ethylene by using which of the following?

Accepted Answer

A)  peroxide initiators 
B)  Ziegler-Natta catalysis 
C)  either a or b 
D)  neither a nor b 
A)  peroxide initiators 
B)  Ziegler-Natta catalysis 
C)  either a or b 
D)  neither a nor b

Question 3

Which of the following is used as the notation for the repeat unit of polypropylene?

Accepted Answer

A)  CH2=CH−CH3 
B)    
C)    
D)  none of these 
A)  CH2=CH−CH3 
B)    
C)    
D)  none of these

Question 4

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C3H5Br?

Accepted Answer

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

Question 5

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?

Accepted Answer

A)  propene 
B)  1-pentene 
C)  1-heptene 
D)  1-nonene 
A)  propene 
B)  1-pentene 
C)  1-heptene 
D)  1-nonene

Question 6

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

Accepted Answer

A)  cis-1-bromopropene 
B)  trans-1-bromopropene 
C)  both a and b 
D)  neither a nor b 
A)  cis-1-bromopropene 
B)  trans-1-bromopropene 
C)  both a and b 
D)  neither a nor b

Question 7

Which of the following is true in the IUPAC system for naming alkenes?

Accepted Answer

A)  The alkene is named based on the longest carbon chain which contains the double bond. 
B)  The position of the double bond is always given the highest possible number. 
C)  The position and identity of substituents determines the number associated with the position of the double bond. 
D)  None of the above is correct. 
A)  The alkene is named based on the longest carbon chain which contains the double bond. 
B)  The position of the double bond is always given the highest possible number. 
C)  The position and identity of substituents determines the number associated with the position of the double bond. 
D)  None of the above is correct.

Question 8

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

Accepted Answer

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

Question 9

How many stereoisomers are possible for 1,4,7-octatriene?

Accepted Answer

A)  2 
B)  4 
C)  8 
D)  16 
A)  2 
B)  4 
C)  8 
D)  16

Question 10

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 11

How many valence electrons are associated with the positively charged carbon in a carbocation?

Accepted Answer

A)  4 
B)  6 
C)  7 
D)  8 
A)  4 
B)  6 
C)  7 
D)  8

Question 12

Which of the following is not a correct IUPAC name for an alkene?

Accepted Answer

A)  1-methyl-1-butene 
B)  2-methyl-1-butene 
C)  3-methyl-1-butene 
D)  2-methyl-2-butene 
A)  1-methyl-1-butene 
B)  2-methyl-1-butene 
C)  3-methyl-1-butene 
D)  2-methyl-2-butene

Question 13

What type(s) of intermediates is/are generated during the acid-catalyzed hydration of an alkene?

Accepted Answer

A)  an oxonium ion 
B)  a carbocation 
C)  both a and b 
D)  neither a nor b 
A)  an oxonium ion 
B)  a carbocation 
C)  both a and b 
D)  neither a nor b

Question 14

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

Accepted Answer

A)    
B)    
C)    
D)  none of the above 
A)    
B)    
C)    
D)  none of the above

Question 15

Cis-trans isomers exist for which of the following?

Accepted Answer

A)  1,2-dimethylcyclopentene 
B)  2,3-dimethylcyclopentene 
C)  3,5-dimethylcyclopentene 
D)  All of them exist. 
A)  1,2-dimethylcyclopentene 
B)  2,3-dimethylcyclopentene 
C)  3,5-dimethylcyclopentene 
D)  All of them exist.

Question 16

What is the charge on the organic intermediate formed during hydrohalogenation?

Accepted Answer

A)  −2 
B)  −1 
C)  +1 
D)  +2 
A)  −2 
B)  −1 
C)  +1 
D)  +2

Question 17

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

Accepted Answer

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

Question 18

Markovnikov's rule is useful in predicting the outcome for which of the following addition reactions of unsymmetrical alkenes?

Accepted Answer

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

Question 19

What is the correct IUPAC name for the following compound?

Accepted Answer

A)  2-methyl-3-propyl-2-butene 
B)  1,1,2-trimethyl-1-pentene 
C)  2,3-dimethyl-2-hexene 
D)  none of these 
A)  2-methyl-3-propyl-2-butene 
B)  1,1,2-trimethyl-1-pentene 
C)  2,3-dimethyl-2-hexene 
D)  none of these

Question 20

Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms?

Accepted Answer

A)  the alkane 
B)  the alkene 
C)  the alkyne 
D)  None, they all contain the same number of hydrogen atoms. 
A)  the alkane 
B)  the alkene 
C)  the alkyne 
D)  None, they all contain the same number of hydrogen atoms.

Exam 12: Alkenes and Alkynes

Which of the following reactions requires a transition metal catalyst?

High-density polyethylene is produced from ethylene by using which of the following?

Which of the following is used as the notation for the repeat unit of polypropylene?

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C3H5Br?

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?

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

Which of the following is true in the IUPAC system for naming alkenes?

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

How many stereoisomers are possible for 1,4,7-octatriene?

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

How many valence electrons are associated with the positively charged carbon in a carbocation?

Which of the following is not a correct IUPAC name for an alkene?

What type(s) of intermediates is/are generated during the acid-catalyzed hydration of an alkene?

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

Cis-trans isomers exist for which of the following?

What is the charge on the organic intermediate formed during hydrohalogenation?

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

Markovnikov's rule is useful in predicting the outcome for which of the following addition reactions of unsymmetrical alkenes?

What is the correct IUPAC name for the following compound?

Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms?

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Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₃H₅Br?