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

Correct Answer

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What is the hybridization of a carbon atom in an alkane?


A) sp3
B) sp2
C) sp
D) p

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

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What is the parent chain for the following compound? What is the parent chain for the following compound? A) Hexane B) Heptane C) Octane D) Nonane


A) Hexane
B) Heptane
C) Octane
D) Nonane

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

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

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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) A) and B)

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) A) and D)
F) A) and C)

Correct Answer

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Rank the following alkanes in order of increasing melting point,putting the alkane with the lowest melting point first. Rank the following alkanes in order of increasing melting point,putting the alkane with the lowest melting point first. A) I < III < II B) I < II < III C) II < III < I D) III < II < I


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

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

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

Correct Answer

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


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

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

Correct Answer

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Which formula represents a cycloalkane with 6 carbons?


A) C6H12
B) C6H14
C) C6H16
D) C6H18

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

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


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

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

Correct Answer

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Which of the following conformation is highest in energy? Which of the following conformation is highest in energy? A) I B) II C) III D) IV


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

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

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-Ethyl-1-methylcyclohexane B) 1-Ethyl-3-methylcyclohexane C) 1-Ethyl-3-methylhexane D) 3-Ethyl-1-methylhexane


A) 3-Ethyl-1-methylcyclohexane
B) 1-Ethyl-3-methylcyclohexane
C) 1-Ethyl-3-methylhexane
D) 3-Ethyl-1-methylhexane

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

Correct Answer

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Which of the following is not a conformer of butane? Which of the following is not a conformer of butane? A) I B) II C) III D) IV


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

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

Correct Answer

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


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

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

Correct Answer

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Which of the following statements about the conformations of acyclic alkanes is true?


A) A staggered conformation with two larger groups 180° from each other is called gauche.
B) Staggered conformations are at energy maxima and eclipsed conformations are energy minima.
C) A staggered conformation with two larger groups 60° from each other is called anti.
D) Gauche conformations are generally higher in energy than anti conformations.

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

Correct Answer

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What is the parent chain for the following compound? What is the parent chain for the following compound? A) Heptane B) Octane C) Nonane D) Decane


A) Heptane
B) Octane
C) Nonane
D) Decane

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

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) A) and B)
F) All of the above

Correct Answer

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