Question 1

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

Question 2

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

Question 3

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

Question 4

What is the IUPAC name for the following compound?

Accepted Answer

A)   1-Butylcyclohexane
B)   Cyclohexanebutane
C)   1-Cyclohexylbutane
D)   ButylcyclohexaneE) None of the above
F) B) and C)

Question 5

Which of the following cycloalkanes has the least angle strain?

Accepted Answer

A)   Cyclopropane
B)   Cyclohexane
C)   Cyclopentane
D)   CycloheptaneE) A) and D)
F) B) and C)

Question 6

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

Question 7

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

Accepted Answer

A)   90°
B)   109.5°
C)   120°
D)   180°E) A) and B)
F) A) and C)

Question 8

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

Question 9

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) None of the above
F) All of the above

Question 10

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

Question 11

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

Accepted Answer

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

Question 12

Which of the following conformers has the highest energy?

Accepted Answer

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

Question 13

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

A)   2
B)   3
C)   4
D)   5E) A) and D)
F) All of the above

Question 16

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

Question 17

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 D)
F) A) and C)

Question 18

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 19

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

Question 20

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

Exam 4: Alkanes

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following are anti conformers?

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedShow Answer

Which of the following conformers has the highest energy?

Correct AnswerverifiedShow Answer

Which of the following cycloalkanes has the least angle strain?

Correct AnswerverifiedShow Answer

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified