Question 1

Which of the following cycloalkanes has the least angle strain?

Accepted Answer

A)   Cyclopropane
B)   Cyclohexane
C)   Cyclopentane
D)   CycloheptaneE) None of the above
F) B) and C)

Question 2

Which of the following is the most stable conformation of cis-1-ethyl-3-isopropylcyclohexane?

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) B) and C)
F) A) and B)

Question 3

What is the IUPAC name for the following compound?

Accepted Answer

A)   1-Butylcyclohexane
B)   Cyclohexanebutane
C)   1-Cyclohexylbutane
D)   ButylcyclohexaneE) All of the above
F) B) and D)

Question 4

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

Accepted Answer

A)   Conformations are the same arrangements of atoms that cannot be interconverted by rotation about single bonds.
B)   In the eclipsed conformation, the C-H bonds on one carbon bisect the H-C-H bond angle on the adjacent carbon.
C)   In the staggered conformation, the C-H bonds on one carbon are directly aligned with the C-H bonds on the adjacent carbon.
D)   Rotating the atoms on one carbon by 60° converts an eclipsed conformation into a staggered conformation, and vice versa.E) A) and C)
F) C) and D)

Question 5

What is the IUPAC name for the following compound?

Accepted Answer

A)   3-Ethyl-1-methylcyclohexane
B)   1-Ethyl-3-methylcyclohexane
C)   1-Ethyl-3-methylhexane
D)   3-Ethyl-1-methylhexaneE) All of the above
F) A) and D)

Question 6

Which of the following is not another representation for 2-methylbutane?

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) All of the above
F) A) and B)

Question 7

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

Accepted Answer

A)   Pentane
B)   2-Methylpentane
C)   2,2-Dimethylpentane
D)   2,2,3-TrimethylpentaneE) B) and C)
F) A) and D)

Question 8

What is the IUPAC name for the following compound?

Accepted Answer

A)   1-Butyl-3-methylcyclohexane
B)   1-sec-Butyl-3-methylcyclohexane
C)   1-Methyl-3-sec-butylcyclohexane
D)   1-sec-Butyl-3-methylhexaneE) B) and C)
F) A) and B)

Question 9

What is the IUPAC name for the following compound?

Accepted Answer

A)   3,5-Diethyl-6-methylheptane
B)   3,5-Diethyl-2-methylheptane
C)   3-Ethyl-5-isopropylheptane
D)   5-Ethyl-3-isopropylheptaneE) None of the above
F) B) and C)

Question 10

Which of the following chair conformations represents trans-1,4-dimethylcyclohexane?

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) C) and D)
F) B) and D)

Question 11

Rank the following alkanes in order of decreasing boiling point, putting the alkane with the highest boiling point first.  II > III B)  I > III > II C)  II > III > I D)  III > II > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I > II > III
B)   I > III > II
C)   II > III > I
D)   III > II > IE) B) and C)
F) A) and D)

Question 12

Rank the following alkanes in order of increasing melting point, putting the alkane with the lowest melting point first.

Accepted Answer

A)   I 
B)   I 
C)   II 
D)   III < II < IE) B) and D)
F) None of the above

Question 13

What is the IUPAC name for the following compound?

Accepted Answer

A)   3-Ethyl-2,7-dimethyl-5-sec-butyldecane
B)   5-sec-Butyl-3-ethyl-2,7-dimethyldecane
C)   2,7-Dimethyl-3-ethyl-5-sec-butyldecane
D)   3-Ethyl-2,7-dimethyl-5-isobutyldecaneE) A) and B)
F) A) and C)

Question 14

Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability, putting the most stable first.  II > III > IV B)  III > II > IV > I C)  III > IV > II > I D)  I > II > IV > III" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I > II > III > IV
B)   III > II > IV > I
C)   III > IV > II > I
D)   I > II > IV > IIIE) B) and C)
F) A) and D)

Question 15

What is the approximate C-C-C bond angle in propane?

Accepted Answer

A)   90°
B)   109.5°
C)   120°
D)   180°E) B) and D)
F) All of the above

Question 16

Which of the following conformers has the highest energy?

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) B) and D)
F) A) and B)

Question 17

How many constitutional isomers are there with the molecular formula C5H12?

Accepted Answer

A)   2
B)   3
C)   4
D)   5E) A) and C)
F) C) and D)

Question 18

Rank the conformers of butane in order of decreasing stability, putting the most stable first.  I > II > III B)  IV > I > III > II C)  II > III > I > IV D)  I > IV > II > III" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   IV > I > II > III
B)   IV > I > III > II
C)   II > III > I > IV
D)   I > IV > II > IIIE) All of the above
F) B) and C)

Question 19

Which of the following are anti conformers?

Accepted Answer

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

Question 20

What is the IUPAC name for the following compound?

Accepted Answer

A)   5-Ethyl-3,6-dimethylheptane
B)   3-Ethyl-2,5-dimethylheptane
C)   3-Ethyl-2,5-dimethyloctane
D)   5-Ethyl-3,6-dimethyloctaneE) B) and D)
F) None of the above

Exam 4: Alkanes

What is the IUPAC name for the following compound?

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What is the approximate C-C-C bond angle in propane?

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What is the IUPAC name for the following compound?

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Rank the following alkanes in order of increasing melting point, putting the alkane with the lowest melting point first.

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What is the IUPAC name for the following compound?

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Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability, putting the most stable first.

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Rank the following alkanes in order of decreasing boiling point, putting the alkane with the highest boiling point first.

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Rank the conformers of butane in order of decreasing stability, putting the most stable first.

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Which of the following cycloalkanes has the least angle strain?

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Which of the following are anti conformers?

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Which of the following chair conformations represents trans-1,4-dimethylcyclohexane?

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What is the IUPAC name for the following compound?

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Which of the following conformers has the highest energy?

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What is the IUPAC name for the following compound?

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What is the IUPAC name for the following compound?

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

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How many constitutional isomers are there with the molecular formula C5H12?

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Which of the following is the most stable conformation of cis-1-ethyl-3-isopropylcyclohexane?

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Which of the following is not another representation for 2-methylbutane?

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

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How many constitutional isomers are there with the molecular formula C₅H₁₂?

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