Question 1

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

Accepted Answer

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

Question 2

Which formula represents a cycloalkane with 6 carbons?

Accepted Answer

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

Question 3

What is the IUPAC name for the following compound?

Accepted Answer

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

Question 4

What is the parent chain for the following compound?

Accepted Answer

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

Question 5

What is the IUPAC name for the following compound?

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

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

Question 9

Which of the following conformation is highest in energy?

Accepted Answer

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

Question 10

Which of the following conformers has the highest energy?

Accepted Answer

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

Question 11

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

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

Which of the following is not a conformer of butane?

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

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. 
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.

Question 17

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-isopropylheptane 
A) 3,5-Diethyl-6-methylheptane 
B) 3,5-Diethyl-2-methylheptane 
C) 3-Ethyl-5-isopropylheptane 
D) 5-Ethyl-3-isopropylheptane

Question 18

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

Accepted Answer

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

Question 19

What is the parent chain for the following compound?

Accepted Answer

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

Question 20

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. 
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.

Exam 4: Alkanes

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

Which formula represents a cycloalkane with 6 carbons?

What is the IUPAC name for the following compound?

What is the parent chain for the following compound?

What is the IUPAC name for the following compound?

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

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

What are the products of the combustion of alkanes?

Which of the following conformation is highest in energy?

Which of the following conformers has the highest energy?

What is the IUPAC name for the following compound?

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

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

Which of the following is not a conformer of butane?

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

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

What is the IUPAC name for the following compound?

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

What is the parent chain for the following compound?

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

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

Filters

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