Question 1

Which of the following best describes the experimental conditions under which an alkane can be chlorinated or brominated?

Accepted Answer

A)  in the dark at room temperature 
B)  only at room temperature 
C)  only in the dark at a low temperature 
D)  at room temperature upon exposure to light 
A)  in the dark at room temperature 
B)  only at room temperature 
C)  only in the dark at a low temperature 
D)  at room temperature upon exposure to light

Question 2

Which of the following is a correct IUPAC name?

Accepted Answer

A)  2-ethylpropane 
B)  2-ethylbutane 
C)  2-ethylpentane 
D)  none of these 
A)  2-ethylpropane 
B)  2-ethylbutane 
C)  2-ethylpentane 
D)  none of these

Question 3

Consider the following ball-and-stick model.   If the hydrogen atom indicated by the arrow is removed, what will be the name of the alkyl group formed?

Accepted Answer

A)  isopropyl 
B)  butyl 
C)  sec-butyl 
D)  tert-butyl 
A)  isopropyl 
B)  butyl 
C)  sec-butyl 
D)  tert-butyl

Question 4

Which of the following is true of pentane and 2-methylbutane?

Accepted Answer

A)  They have the same molecular formula. 
B)  They have the same boiling point. 
C)  They have the same molecular formula and the same boiling point. 
D)  None of these. 
A)  They have the same molecular formula. 
B)  They have the same boiling point. 
C)  They have the same molecular formula and the same boiling point. 
D)  None of these.

Question 5

How is a butyl group formed?

Accepted Answer

A)  by removing a hydrogen atom from the first carbon of butane 
B)  by removing a hydrogen atom from the second carbon of butane 
C)  by removing a hydrogen atom from the first carbon of 2-methylpropane 
D)  by removing a hydrogen atom from the second carbon of 2-methylpropane 
A)  by removing a hydrogen atom from the first carbon of butane 
B)  by removing a hydrogen atom from the second carbon of butane 
C)  by removing a hydrogen atom from the first carbon of 2-methylpropane 
D)  by removing a hydrogen atom from the second carbon of 2-methylpropane

Question 6

Which of the following is true of the C-H equatorial bonds in cyclohexane?

Accepted Answer

A)  Each carbon atom of the ring is bonded to two hydrogen atoms at equatorial positions. 
B)  The C-H equatorial bonds are oriented perpendicular to the imaginary axis of the ring. 
C)  The C-H equatorial bonds are positioned on the same side of the ring. 
D)  All C-H equatorial bonds point upward. 
A)  Each carbon atom of the ring is bonded to two hydrogen atoms at equatorial positions. 
B)  The C-H equatorial bonds are oriented perpendicular to the imaginary axis of the ring. 
C)  The C-H equatorial bonds are positioned on the same side of the ring. 
D)  All C-H equatorial bonds point upward.

Question 7

When deriving an IUPAC name, which of the following prefixes should be ignored during the alphabetizing of substituents?

Accepted Answer

A)  di- 
B)  sec- 
C)  tri- 
D)  all of these 
A)  di- 
B)  sec- 
C)  tri- 
D)  all of these

Question 8

Which of the following Freons has an atmospheric lifetime of 100 years?

Accepted Answer

A)  CFC-11 
B)  CFC-113 
C)  CFC-12 
D)  CFC-22 
A)  CFC-11 
B)  CFC-113 
C)  CFC-12 
D)  CFC-22

Question 9

Which of the following is a correct IUPAC name?

Accepted Answer

A)  2-ethyl-3-methylpentane 
B)  2,2-dimethylpentane 
C)  2,2-diethylpentane 
D)  all of these 
A)  2-ethyl-3-methylpentane 
B)  2,2-dimethylpentane 
C)  2,2-diethylpentane 
D)  all of these

Question 10

Which of the following hydrocarbons is a gas?

Accepted Answer

A)  methane 
B)  hexane 
C)  nonane 
D)  pentane 
A)  methane 
B)  hexane 
C)  nonane 
D)  pentane

Question 11

What is the correct structure for trans-1,2-dimethylcyclopropane?

Accepted Answer

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

Question 12

Which of the following statements is true?

Accepted Answer

A)  Carbon tetrachloride was once widely used as a degreaser. 
B)  Carbon tetrachloride is both toxic and carcinogenic. 
C)  Dichloromethane is currently a widely used organic solvent. 
D)  All of these statements are true. 
A)  Carbon tetrachloride was once widely used as a degreaser. 
B)  Carbon tetrachloride is both toxic and carcinogenic. 
C)  Dichloromethane is currently a widely used organic solvent. 
D)  All of these statements are true.

Question 13

Which of the following statements about butane's conformation is false?

Accepted Answer

A)  Butane can exist in an infinite number of possible conformations. 
B)  At any given time, most butane molecules exist in the most crowded conformation. 
C)  Butane can change from one conformation to another by the rotation of its C-C single bonds. 
D)  All of these statements are false. 
A)  Butane can exist in an infinite number of possible conformations. 
B)  At any given time, most butane molecules exist in the most crowded conformation. 
C)  Butane can change from one conformation to another by the rotation of its C-C single bonds. 
D)  All of these statements are false.

Question 14

Which type of hydrocarbons are alkanes?

Accepted Answer

A)  heterocyclic 
B)  aromatic 
C)  saturated 
D)  unsaturated 
A)  heterocyclic 
B)  aromatic 
C)  saturated 
D)  unsaturated

Question 15

Consider the following ball-and-stick model.   Which of the following is another way of representing the given structure?

Accepted Answer

A)  C5H10 
B)  CH3CH2CH2CH2CH3 
C)    
D)  All the structures are accurate representations. 
A)  C5H10 
B)  CH3CH2CH2CH2CH3 
C)    
D)  All the structures are accurate representations.

Question 16

Which of the following molecules can exist as cis-trans isomers?

Accepted Answer

A)  1,1-dimethylcyclobutane 
B)  1,2-dimethylcyclobutane 
C)  both 1,1-dimethylcyclobutane and 1,2-dimethylcyclobutane 
D)  none of these 
A)  1,1-dimethylcyclobutane 
B)  1,2-dimethylcyclobutane 
C)  both 1,1-dimethylcyclobutane and 1,2-dimethylcyclobutane 
D)  none of these

Question 17

Which of the following is true of the different conformations of a cycloalkane?

Accepted Answer

A)  They are constitutional isomers of one another. 
B)  They are obtained by rotation about the carbon-carbon bonds. 
C)  They are obtained by the formation of new carbon-carbon bonds. 
D)  They are equally stable. 
A)  They are constitutional isomers of one another. 
B)  They are obtained by rotation about the carbon-carbon bonds. 
C)  They are obtained by the formation of new carbon-carbon bonds. 
D)  They are equally stable.

Question 18

Which of the following is the correct line-angle structure for 3-ethylheptane?

Accepted Answer

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

Question 19

What are the products obtained from the complete oxidation of propane?

Accepted Answer

A)  CO2 and O2 
B)  CO2 and O3 
C)  C and O2 
D)  H2O and CO2 
A)  CO2 and O2 
B)  CO2 and O3 
C)  C and O2 
D)  H2O and CO2

Question 20

Which of the following IUPAC names is incorrect?

Accepted Answer

A)  methylcyclohexane 
B)  cis-1,4-dimethylcyclohexane 
C)  cis-1,1,2-trimethylcyclohexane 
D)  none of these 
A)  methylcyclohexane 
B)  cis-1,4-dimethylcyclohexane 
C)  cis-1,1,2-trimethylcyclohexane 
D)  none of these

Exam 11: Alkanes

Which of the following best describes the experimental conditions under which an alkane can be chlorinated or brominated?

Which of the following is a correct IUPAC name?

Consider the following ball-and-stick model. If the hydrogen atom indicated by the arrow is removed, what will be the name of the alkyl group formed?

Which of the following is true of pentane and 2-methylbutane?

How is a butyl group formed?

Which of the following is true of the C-H equatorial bonds in cyclohexane?

When deriving an IUPAC name, which of the following prefixes should be ignored during the alphabetizing of substituents?

Which of the following Freons has an atmospheric lifetime of 100 years?

Which of the following is a correct IUPAC name?

Which of the following hydrocarbons is a gas?

What is the correct structure for trans-1,2-dimethylcyclopropane?

Which of the following statements is true?

Which of the following statements about butane's conformation is false?

Which type of hydrocarbons are alkanes?

Consider the following ball-and-stick model. Which of the following is another way of representing the given structure?

Which of the following molecules can exist as cis-trans isomers?

Which of the following is true of the different conformations of a cycloalkane?

Which of the following is the correct line-angle structure for 3-ethylheptane?

What are the products obtained from the complete oxidation of propane?

Which of the following IUPAC names is incorrect?

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