Question 1

What is the IUPAC name for the following compound?

Accepted Answer

A)  Hexylcyclopentane
B)  1-Hexylcyclopentane
C)  1-Cyclopentylhexane
D)  1-CyclopentylheptaneE) A) and D)
F) A) and C)

Question 2

What are the products of the combustion of alkanes?

Accepted Answer

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

Question 3

Which formula represents a cycloalkane with 5 carbons?

Accepted Answer

A)  C5H8
B)  C5H10
C)  C5H12
D)  C5H14E) None of the above
F) C) and D)

Question 4

What is the common name of the following alkyl group?

Accepted Answer

A)  Isobutyl
B)  sec-Butyl
C)  Isopropyl
D)  tert-ButylE) A) and D)
F) A) and C)

Question 5

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) B) and C)

Question 6

Which of the following cycloalkanes has the most angle strain?

Accepted Answer

A)  Cyclopropane
B)  Cyclobutane
C)  Cyclopentane
D)  CyclohexaneE) All of the above
F) None of the above

Question 7

How many cycloalkane constitutional isomers (excluding stereoisomers) are there with molecular formula C5H10?

Accepted Answer

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

Question 8

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 B)
F) A) and C)

Question 9

What is the name of the alkyl group that contains two carbons in a straight chain and one-carbon branch?

Accepted Answer

A)  Ethyl
B)  Propyl
C)  Isopropyl
D)  None of theseE) C) and D)
F) A) and D)

Question 10

What is the IUPAC name for the following compound?

Accepted Answer

A)  2,3-Dimethyl-4-sec-butylheptane
B)  4-sec-Butyl-2,3-dimethylheptane
C)  3,5,6-Trimethyl-4-propylheptane
D)  2,3,5-Trimethyl-4-propylheptaneE) All of the above
F) A) and D)

Question 11

Which of the following is the most stable conformation of the following compound?

Accepted Answer

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

Question 12

Which of the following is the highest energy conformer of 2,3-dimethylbutane?

Accepted Answer

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

Question 13

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 C)
F) A) and D)

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 B)
F) A) and C)

Question 15

Which of the following conformers has the highest energy?

Accepted Answer

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

Question 16

Which of the following cycloalkanes has the least angle strain?

Accepted Answer

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

Question 17

Which of the following statements about alkanes is not true?

Accepted Answer

A)  Alkanes are aliphatic hydrocarbons.
B)  Alkanes contain only C-C and C-H s bonds.
C)  Alkanes are acyclic or cyclic.
D)  Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons.E) A) and D)
F) B) and C)

Question 18

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

Accepted Answer

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 D)

Question 19

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

Question 20

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

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) All of the above
F) None of the above

Exam 4: Alkanes

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

Correct AnswerverifiedShow Answer

What are the products of the combustion of alkanes?

Correct AnswerverifiedShow Answer

Which of the following cycloalkanes has the most angle strain?

Correct AnswerverifiedShow Answer

What is the common name of the following alkyl group?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements about alkanes is not true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following conformers has the highest energy?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is the most stable conformation of the following compound?

Correct AnswerverifiedShow Answer

Which formula represents a cycloalkane with 5 carbons?

Correct AnswerverifiedShow Answer

What is the name of the alkyl group that contains two carbons in a straight chain and one-carbon branch?

Correct AnswerverifiedShow Answer

What is the IUPAC name for the following compound?

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

How many cycloalkane constitutional isomers (excluding stereoisomers) are there with molecular formula C5H10?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is the highest energy conformer of 2,3-dimethylbutane?

Correct AnswerverifiedShow Answer

Which of the following cycloalkanes has the least angle strain?

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 not true?

Correct AnswerverifiedShow Answer

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

How many cycloalkane constitutional isomers (excluding stereoisomers) are there with molecular formula C₅H₁₀?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified