Question 1

Which of the following structure(s)is represented by the following IUPAC name 4-ethyl-2-methylheptane?

Accepted Answer

A)  II only 
B)  I and II 
C)  I, II, and IV 
D)  II and III 
E)  All of these are 4-ethyl-2-methylheptane. 
A)  II only 
B)  I and II 
C)  I, II, and IV 
D)  II and III 
E)  All of these are 4-ethyl-2-methylheptane. B

Question 2

Which of the molecules below are branched?

Accepted Answer

A)  I only 
B)  II and IV 
C)  II, III, and IV 
D)  I and III 
E)  All of these molecules are branched. 
A)  I only 
B)  II and IV 
C)  II, III, and IV 
D)  I and III 
E)  All of these molecules are branched. B

Question 3

What is the IUPAC name of this hydrocarbon?

Accepted Answer

A)  trans-5-methyl-2-heptene 
B)  cis-5-ethyl-2-hexene 
C)  trans-3-methyl-5-heptene 
D)  cis-2-ethyl-5-hexene 
E)  trans-1-ethyl-1-methyl-2-butene 
A)  trans-5-methyl-2-heptene 
B)  cis-5-ethyl-2-hexene 
C)  trans-3-methyl-5-heptene 
D)  cis-2-ethyl-5-hexene 
E)  trans-1-ethyl-1-methyl-2-butene A

Question 4

Alkanes freely rotate about their carbon-carbon bonds.The various rotational forms of the molecule are called ____________.

Accepted Answer

A)  compounds 
B)  mirror images 
C)  conformations 
D)  isomers 
E)  rotatiomers 
A)  compounds 
B)  mirror images 
C)  conformations 
D)  isomers 
E)  rotatiomers

Question 5

Which of the following skeletal line structures are isomers?

Accepted Answer

A)  All of these are isomers. 
B)  I and II 
C)  I, II, and III 
D)  III and IV 
E)  II and III 
A)  All of these are isomers. 
B)  I and II 
C)  I, II, and III 
D)  III and IV 
E)  II and III

Question 6

Which of the following compounds contains a heteroatom?

Accepted Answer

A)  All of these compounds contain a heteroatom. 
B)  I and II contain a heteroatom. 
C)  III and IV contain a heteroatom. 
D)  Only III contains a heteroatom. 
E)  I, II, and III contain a heteroatom. 
A)  All of these compounds contain a heteroatom. 
B)  I and II contain a heteroatom. 
C)  III and IV contain a heteroatom. 
D)  Only III contains a heteroatom. 
E)  I, II, and III contain a heteroatom.

Question 7

Which statement BEST describes the relationship between the following two structures?

Accepted Answer

A)  They are identical molecules in the same conformation. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are different conformations of the same molecule. 
E)  One is saturated, and the other is unsaturated. 
A)  They are identical molecules in the same conformation. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are different conformations of the same molecule. 
E)  One is saturated, and the other is unsaturated.

Question 8

A hydrocarbon contains

Accepted Answer

A)  only carbon, hydrogen, nitrogen, and oxygen. 
B)  only carbon and hydrogen. 
C)  only carbon, hydrogen, and oxygen. 
D)  only carbon, hydrogen, and nitrogen. 
E)  any element except carbon and hydrogen. 
A)  only carbon, hydrogen, nitrogen, and oxygen. 
B)  only carbon and hydrogen. 
C)  only carbon, hydrogen, and oxygen. 
D)  only carbon, hydrogen, and nitrogen. 
E)  any element except carbon and hydrogen.

Question 9

What is the C-C-C bond angle indicated by the arrow in limonene, one of the components of oil of lemon?

Accepted Answer

A)  180° 
B)  120° 
C)  109.5° 
D)  90° 
E)  45° 
A)  180° 
B)  120° 
C)  109.5° 
D)  90° 
E)  45°

Question 10

Which is a saturated hydrocarbon?

Accepted Answer

A)  C3H6 
B)  C6H6 
C)  C4H6 
D)  C4H10 
E)  C2H4 
A)  C3H6 
B)  C6H6 
C)  C4H6 
D)  C4H10 
E)  C2H4

Question 11

Which structure is heptane?

Accepted Answer

A)    
B)    
C)    
D)    
E)  All of these are heptane. 
A)    
B)    
C)    
D)    
E)  All of these are heptane.

Question 12

Aspirin contains a benzene ring substituted on the first and second carbon.Which molecule is aspirin?

Accepted Answer

A)    
B)    
C)    
D)    
E)  All of the above are aspirin molecules. 
A)    
B)    
C)    
D)    
E)  All of the above are aspirin molecules.

Question 13

Which skeletal line structure is the same molecule as the ball-and-stick model below?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 14

Which element is NOT a heteroatom?

Accepted Answer

A)  carbon 
B)  sulfur 
C)  nitrogen 
D)  oxygen 
E)  phosphorous 
A)  carbon 
B)  sulfur 
C)  nitrogen 
D)  oxygen 
E)  phosphorous

Question 15

Which statement about alkanes is FALSE?

Accepted Answer

A)  Alkanes can move and twist. 
B)  Merely rotating a C-C bond does not change the identity of an alkane. 
C)  Alkanes are hydrophilic. 
D)  Alkanes rapidly twist and rotate at higher temperatures. 
E)  Alkanes are often found in a zigzag shape. 
A)  Alkanes can move and twist. 
B)  Merely rotating a C-C bond does not change the identity of an alkane. 
C)  Alkanes are hydrophilic. 
D)  Alkanes rapidly twist and rotate at higher temperatures. 
E)  Alkanes are often found in a zigzag shape.

Question 16

Which of the hydrocarbons listed are unsaturated?

Accepted Answer

A)  alkanes only 
B)  alkenes and alkynes only 
C)  alkenes, alkynes, and aromatics 
D)  alkanes, alkenes, alkynes, and aromatics 
E)  aromatics only 
A)  alkanes only 
B)  alkenes and alkynes only 
C)  alkenes, alkynes, and aromatics 
D)  alkanes, alkenes, alkynes, and aromatics 
E)  aromatics only

Question 17

What is the IUPAC name of the following branched-chain hydrocarbon?

Accepted Answer

A)  trans-2-ethyl-2-propylpropane 
B)  3,3-dimethylhexane 
C)  3-ethyl-3,3-dimethylpropane 
D)  2-ethyl-2-methylpentane 
E)  2-propyl-2-methylbutane 
A)  trans-2-ethyl-2-propylpropane 
B)  3,3-dimethylhexane 
C)  3-ethyl-3,3-dimethylpropane 
D)  2-ethyl-2-methylpentane 
E)  2-propyl-2-methylbutane

Question 18

β-Carotene is the molecule that gives carrots their orange color.Which characteristic of β-carotene is primarily responsible for the orange color?

Accepted Answer

A)  the branched chain 
B)  the two cyclohexanes 
C)  It is a polyene. 
D)  the trans geometry 
E)  the number of carbons 
A)  the branched chain 
B)  the two cyclohexanes 
C)  It is a polyene. 
D)  the trans geometry 
E)  the number of carbons

Question 19

What is the name of the following branched-chain hydrocarbon?

Accepted Answer

A)  1,2,3-trimethyl-4-hexyne 
B)  4,5-dimethyl-2-heptyne 
C)  3,4-dimethyl-5-heptyne 
D)  5-ethyl-4-methyl-2-hexyne 
E)  2-propynyl-3-methylpentane 
A)  1,2,3-trimethyl-4-hexyne 
B)  4,5-dimethyl-2-heptyne 
C)  3,4-dimethyl-5-heptyne 
D)  5-ethyl-4-methyl-2-hexyne 
E)  2-propynyl-3-methylpentane

Question 20

What type of change is illustrated in the reaction of rhodopsin in the presence of light shown below?

Accepted Answer

A)  a physical change 
B)  a conformational change 
C)  an isomerization reaction 
D)  rotation about a bond as a result of free bond rotation 
E)  None of these are illustrated. 
A)  a physical change 
B)  a conformational change 
C)  an isomerization reaction 
D)  rotation about a bond as a result of free bond rotation 
E)  None of these are illustrated.

Which of the following structure(s)is represented by the following IUPAC name 4-ethyl-2-methylheptane?

Which of the molecules below are branched?

What is the IUPAC name of this hydrocarbon?

Alkanes freely rotate about their carbon-carbon bonds.The various rotational forms of the molecule are called ____________.

Which of the following skeletal line structures are isomers?

Which of the following compounds contains a heteroatom?

Which statement BEST describes the relationship between the following two structures?

A hydrocarbon contains

What is the C-C-C bond angle indicated by the arrow in limonene, one of the components of oil of lemon?

Which is a saturated hydrocarbon?

Which structure is heptane?

Aspirin contains a benzene ring substituted on the first and second carbon.Which molecule is aspirin?

Which skeletal line structure is the same molecule as the ball-and-stick model below?

Which element is NOT a heteroatom?

Which statement about alkanes is FALSE?

Which of the hydrocarbons listed are unsaturated?

What is the IUPAC name of the following branched-chain hydrocarbon?

β-Carotene is the molecule that gives carrots their orange color.Which characteristic of β-carotene is primarily responsible for the orange color?

What is the name of the following branched-chain hydrocarbon?

What type of change is illustrated in the reaction of rhodopsin in the presence of light shown below?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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Exam 10: Introduction to Organic Chemistry:

Which of the following structure(s)is represented by the following IUPAC name 4-ethyl-2-methylheptane?

Which of the molecules below are branched?

What is the IUPAC name of this hydrocarbon?

Alkanes freely rotate about their carbon-carbon bonds.The various rotational forms of the molecule are called ____________.

Which of the following skeletal line structures are isomers?

Which of the following compounds contains a heteroatom?

Which statement BEST describes the relationship between the following two structures?

A hydrocarbon contains

What is the C-C-C bond angle indicated by the arrow in limonene, one of the components of oil of lemon?

Which is a saturated hydrocarbon?

Which structure is heptane?

Aspirin contains a benzene ring substituted on the first and second carbon.Which molecule is aspirin?

Which skeletal line structure is the same molecule as the ball-and-stick model below?

Which element is NOT a heteroatom?

Which statement about alkanes is FALSE?

Which of the hydrocarbons listed are unsaturated?

What is the IUPAC name of the following branched-chain hydrocarbon?

β-Carotene is the molecule that gives carrots their orange color.Which characteristic of β-carotene is primarily responsible for the orange color?

What is the name of the following branched-chain hydrocarbon?

What type of change is illustrated in the reaction of rhodopsin in the presence of light shown below?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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