Question 1

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

Accepted Answer

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

Question 2

Which of the following compounds can adopt a chair conformation in which there are no axial methyl groups?

Accepted Answer

A)   cis-1,2-dimethylcyclohexane
B)   cis-1,3-dimethylcyclohexane
C)   trans-1,3-dimethylcyclohexane
D)   cis-1,4-dimethylcyclohexaneE) None of the above
F) A) and B)

Question 3

Which of the following Newman projections represents the most stable conformation of 2,3-dimethylbutane?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) All of the above

Question 4

What is the IUPAC name of the following compound?

Accepted Answer

A)   3-propylpentane
B)   1,1-diethylpropane
C)   3-ethylhexane
D)   isooctaneE) A) and C)
F) B) and D)

Question 5

Which of the following undergoes the most exothermic combustion?

Accepted Answer

A)   octane
B)   2-methylheptane
C)   2,2-dimethylhexane
D)   2,2,3,3-tetramethylbutaneE) A) and B)
F) A) and C)

Question 6

Which one of the following structures represents a different compound from the other three?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) None of the above
F) A) and C)

Question 7

What is the IUPAC name for the following compound?

Accepted Answer

A)   bicyclo[5.4.3]octane
B)   bicyclo[3.2.1]octane
C)   bicyclo[3.2.1]hexane
D)   bicyclo[2.2.1]octaneE) B) and C)
F) A) and B)

Question 8

What is the IUPAC name of the following compound?

Accepted Answer

cis-1-tert...

Question 9

What is the IUPAC name of the following compound?

Accepted Answer

2,4,4-trim...

Question 10

Provide a neatly drawn plot of energy versus dihedral angle for rotation around the C-C bond of ethane.

Accepted Answer

The answer of Provide a neatly drawn plot of energy...

Question 11

What is the correct assignment of common names for the following molecules?

Accepted Answer

A)   i = butane; ii = neopentane; iii = isopentane
B)   i = neobutane; ii = isobutane; iii = pentane
C)   i = butane; ii = isobutane; iii = isopentane
D)   i = butane; ii = isobutane; iii = neopentaneE) All of the above
F) A) and B)

Question 12

What is the IUPAC name of the following compound?

Accepted Answer

A)   bicyclo[4.3]nonane
B)   bicyclo[4.3.0]nonane
C)   bicyclo[6.5]nonane
D)   bicyclo[6.5.0]nonaneE) B) and D)
F) None of the above

Question 13

Which of the following Newman projections does not represent 2-methylhexane?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) A) and C)

Question 14

Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) C) and D)

Question 15

Which of the following Newman projections represents 2,4-dimethylpentane?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) None of the above
F) C) and D)

Question 16

Which of the following substituted cyclohexanes has the most negative value of DG °\degree°  for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

Accepted Answer

A)   fluorocyclohexane
B)   methylcyclohexane
C)   ethylcyclohexane
D)   tert-butylcyclohexane E) None of the above
F) A) and C)

Question 17

How many moles of molecular oxygen (O2)  are consumed in the complete combustion of one mole of hexane (C6H14) ?

Accepted Answer

A)   6
B)   9.5
C)   12.5
D)   14E) B) and C)
F) C) and D)

Question 18

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

Accepted Answer

A)   90 °\degree° 
B)   109 °\degree° 
C)   120 °\degree° 
D)   180 °\degree°E) B) and D)
F) C) and D)

Question 19

Which of the following alkanes has the highest boiling point?

Accepted Answer

A)   propane
B)   butane
C)   pentane
D)   hexaneE) None of the above
F) C) and D)

Question 20

What is the IUPAC name of the following compound?

Accepted Answer

A)   trans-1-isopropyl-4-methylcyclohexane
B)   cis-1-isopropyl-4-methylcyclohexane
C)   cis-2-isopropyl-5-methylcyclohexane
D)   cis-1-tert-butyl-4-methylcyclohexaneE) None of the above
F) B) and C)

Exam 2: Alkanes and Cycloalkanes

Provide a neatly drawn plot of energy versus dihedral angle for rotation around the C-C bond of ethane.

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Which of the following compounds can adopt a chair conformation in which there are no axial methyl groups?

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Which of the following undergoes the most exothermic combustion?

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Which one of the following structures represents a different compound from the other three?

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Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane?

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

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Which of the following Newman projections represents 2,4-dimethylpentane?

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

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What is the IUPAC name of the following compound?

Correct Answerverified2,4,4-trim...View AnswerShow Answer

What is the IUPAC name for the following compound?

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What is the IUPAC name of the following compound?

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What is the IUPAC name of the following compound?

Correct Answerverifiedcis-1-tert...View AnswerShow Answer

What is the correct assignment of common names for the following molecules?

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Which of the following Newman projections represents the most stable conformation of 2,3-dimethylbutane?

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What is the IUPAC name of the following compound?

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Which of the following substituted cyclohexanes has the most negative value of DG °\degree° for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

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Which of the following alkanes has the highest boiling point?

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How many moles of molecular oxygen (O2) are consumed in the complete combustion of one mole of hexane (C6H14) ?

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Which of the following Newman projections does not represent 2-methylhexane?

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What is the IUPAC name of the following compound?

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

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2,4,4-trim...
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cis-1-tert...
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Which of the following substituted cyclohexanes has the most negative value of DG $\degree$ for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

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How many moles of molecular oxygen (O₂) are consumed in the complete combustion of one mole of hexane (C₆H₁₄) ?

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