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Which of the following are gauche conformers? Which of the following are gauche conformers? A) I and II B) I and III C) II and IV D) II and III


A) I and II
B) I and III
C) II and IV
D) II and III

E) All of the above
F) B) and C)

Correct Answer

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Which of the following is the most stable conformation of trans-1-isopropyl-3-methylcyclohexane? Which of the following is the most stable conformation of trans-1-isopropyl-3-methylcyclohexane? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) B) and C)
F) A) and D)

Correct Answer

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What is the alternate chair conformation of the following compound? What is the alternate chair conformation of the following compound? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) All of the above
F) None of the above

Correct Answer

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Rank the following alkanes in order of increasing boiling point. Rank the following alkanes in order of increasing boiling point. A) I > II > III > IV B) IV > III > II > I C) II > III > IV > I D) IV > III > I > II


A) I > II > III > IV
B) IV > III > II > I
C) II > III > IV > I
D) IV > III > I > II

E) C) and D)
F) A) and B)

Correct Answer

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Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability, putting the most stable first. Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability, putting the most stable first. A) I > II > III > IV B) III > II > IV > I C) III > IV > II > I D) I > II > IV > III


A) I > II > III > IV
B) III > II > IV > I
C) III > IV > II > I
D) I > II > IV > III

E) All of the above
F) A) and C)

Correct Answer

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What is the IUPAC name for the following compound? What is the IUPAC name for the following compound? A) 3,5-Diethyl-6-methylheptane B) 3,5-Diethyl-2-methylheptane C) 3-Ethyl-5-isopropylheptane D) 5-Ethyl-3-isopropylheptane


A) 3,5-Diethyl-6-methylheptane
B) 3,5-Diethyl-2-methylheptane
C) 3-Ethyl-5-isopropylheptane
D) 5-Ethyl-3-isopropylheptane

E) All of the above
F) C) and D)

Correct Answer

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Which of the following statements about the conformations of acyclic alkanes is not true?


A) The staggered and eclipsed conformations are equally stable.
B) The staggered conformations are more stable than the eclipsed conformations.
C) An energy minimum and maximum occur every 60° as the conformation changes from staggered to eclipsed.
D) Conformations that are neither staggered nor eclipsed are intermediate in energy.

E) A) and C)
F) B) and C)

Correct Answer

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What is the IUPAC name for the following compound? What is the IUPAC name for the following compound? A) 2,3,5-Trimethylhexane B) 2,4,5-Triethylhexane C) 2,4-Diethyl-5-methylheptane D) 4-Ethyl-3,6-dimethyloctane


A) 2,3,5-Trimethylhexane
B) 2,4,5-Triethylhexane
C) 2,4-Diethyl-5-methylheptane
D) 4-Ethyl-3,6-dimethyloctane

E) None of the above
F) All of the above

Correct Answer

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Which of the following conformers has the highest energy? Which of the following conformers has the highest energy? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) C) and D)
F) B) and C)

Correct Answer

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What is the IUPAC name for the following compound? What is the IUPAC name for the following compound? A) 1-sec-Butyl-4-isopropyl-2-methylcyclohexane B) 1-Isopropyl-3-methyl-4-sec-butylcyclohexane C) 4-Isopropyl-2-methyl-1-sec-butylcyclohexane D) 1-sec-Butyl-3-isopropyl-2-methylcyclohexane


A) 1-sec-Butyl-4-isopropyl-2-methylcyclohexane
B) 1-Isopropyl-3-methyl-4-sec-butylcyclohexane
C) 4-Isopropyl-2-methyl-1-sec-butylcyclohexane
D) 1-sec-Butyl-3-isopropyl-2-methylcyclohexane

E) All of the above
F) C) and D)

Correct Answer

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How many constitutional isomers are there with the molecular formula C6H14?


A) 2
B) 3
C) 4
D) 5

E) A) and D)
F) B) and C)

Correct Answer

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What is the IUPAC name for the following compound? What is the IUPAC name for the following compound? A) 1,4-Dimethylcyclohexane B) 1,3-Dimethylcyclohexane C) 1,3-Dimethylcyclopentane D) 1,4-Dimethylcyclopentane


A) 1,4-Dimethylcyclohexane
B) 1,3-Dimethylcyclohexane
C) 1,3-Dimethylcyclopentane
D) 1,4-Dimethylcyclopentane

E) All of the above
F) B) and D)

Correct Answer

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Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) B) and C)
F) C) and D)

Correct Answer

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Rank the following alkanes in order of decreasing boiling point, putting the alkane with the highest boiling point first. Rank the following alkanes in order of decreasing boiling point, putting the alkane with the highest boiling point first. A) I > II > III B) I > III > II C) II > III > I D) III > II > I


A) I > II > III
B) I > III > II
C) II > III > I
D) III > II > I

E) None of the above
F) B) and D)

Correct Answer

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Which of the following compounds has only primary, secondary, and tertiary carbon atoms?


A) Pentane
B) 2-Methylpentane
C) 2,2-Dimethylpentane
D) 2,2,3-Trimethylpentane

E) B) and C)
F) A) and B)

Correct Answer

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What are the products of the combustion of alkanes?


A) Carbon and hydrogen
B) Carbon and water
C) Carbon dioxide and hydrogen
D) Carbon dioxide and water

E) B) and C)
F) A) and C)

Correct Answer

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Which of the following statements about alkanes is true?


A) Alkanes are aliphatic hydrocarbons having only C-C and C-H p bonds.
B) Cyclic alkanes have two fewer H atoms than acyclic alkanes with the same number of carbons.
C) Acyclic alkanes contain carbons joined in one or more rings.
D) Acyclic alkanes have the general molecular formula CnH2n.

E) A) and C)
F) B) and D)

Correct Answer

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Which of the following chair conformations represents trans-1,4-dimethylcyclohexane? Which of the following chair conformations represents trans-1,4-dimethylcyclohexane? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) A) and B)
F) A) and C)

Correct Answer

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Select the most stable conformer of cis-1,3-cyclohexanediol <sup> </sup>Select the most stable conformer of cis-1,3-cyclohexanediol A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) A) and C)
F) None of the above

Correct Answer

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What is the IUPAC name of the following compound? What is the IUPAC name of the following compound? A) Pentane B) 2-Methylpentane C) 2-Methyl-3-ethylpentane D) 3-Ethyl-2-methylpentane


A) Pentane
B) 2-Methylpentane
C) 2-Methyl-3-ethylpentane
D) 3-Ethyl-2-methylpentane

E) B) and C)
F) A) and C)

Correct Answer

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