Question 1

Which of the following structure(s) is represented by the following IUPAC name?

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.

Question 2

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 3

Which skeletal line structure best represents 2-butyne?

Accepted Answer

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

Question 4

Below is an illustration of a molecule of cyclohexane. Which of the following choices best describes why this illustration does not represent cyclohexane accurately?

Accepted Answer

A)  The molecule illustrated does not contain enough carbons. 
B)  The molecule illustrated contains too many carbons. 
C)  The molecule illustrated is not saturated. 
D)  The molecule illustrated is flat. 
E)  The molecule illustrated is puckered. 
A)  The molecule illustrated does not contain enough carbons. 
B)  The molecule illustrated contains too many carbons. 
C)  The molecule illustrated is not saturated. 
D)  The molecule illustrated is flat. 
E)  The molecule illustrated is puckered.

Question 5

Which of the following structures 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 6

Arachidonic acid is a fat found in many foods such as meat, dairy products, and eggs. What type of carbon-carbon double bonds does arachidonic acid contain?

Accepted Answer

A)  Arachidonic acid contains all trans double bonds. 
B)  Arachidonic acid contains all cis double bonds. 
C)  Arachidonic acid contains two cis and two trans double bonds. 
D)  Arachidonic acid contains one cis and three trans double bonds. 
E)  Arachidonic acid contains three cis and one trans double bonds. 
A)  Arachidonic acid contains all trans double bonds. 
B)  Arachidonic acid contains all cis double bonds. 
C)  Arachidonic acid contains two cis and two trans double bonds. 
D)  Arachidonic acid contains one cis and three trans double bonds. 
E)  Arachidonic acid contains three cis and one trans double bonds.

Question 7

A molecule has the following IUPAC name: 1-hexyne. What does this name mean?

Accepted Answer

A)  The molecule is an unbranched six-carbon alkane. 
B)  The molecule is a branched six-carbon alkane. 
C)  The molecule is an unbranched six-carbon alkene. 
D)  The molecule is a branched six-carbon alkyne. 
E)  The molecule is an unbranched six-carbon alkyne. 
A)  The molecule is an unbranched six-carbon alkane. 
B)  The molecule is a branched six-carbon alkane. 
C)  The molecule is an unbranched six-carbon alkene. 
D)  The molecule is a branched six-carbon alkyne. 
E)  The molecule is an unbranched six-carbon alkyne.

Question 8

An alkene has _______ a saturated hydrocarbon with the same number of hydrogens.

Accepted Answer

A)  two more hydrogens than 
B)  one more hydrogen than 
C)  the same number of hydrogens as 
D)  one fewer hydrogen than 
E)  two fewer hydrogens than 
A)  two more hydrogens than 
B)  one more hydrogen than 
C)  the same number of hydrogens as 
D)  one fewer hydrogen than 
E)  two fewer hydrogens than

Question 9

Which of the following 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 10

Which of the following hydrocarbons are branched and which are straight chains?

Accepted Answer

A)  All of these hydrocarbons are branched. 
B)  All of these hydrocarbons are branched except II. 
C)  All of these hydrocarbons are straight chains except III. 
D)  I and III are branched, and II and IV are straight chains. 
E)  II, III, and IV are straight chains and I is branched. 
A)  All of these hydrocarbons are branched. 
B)  All of these hydrocarbons are branched except II. 
C)  All of these hydrocarbons are straight chains except III. 
D)  I and III are branched, and II and IV are straight chains. 
E)  II, III, and IV are straight chains and I is branched.

Question 11

Organic chemistry is the study of compounds that

Accepted Answer

A)  are biologically important. 
B)  contain oxygen. 
C)  make up living things. 
D)  are not harmful to the environment. 
E)  contain carbon. 
A)  are biologically important. 
B)  contain oxygen. 
C)  make up living things. 
D)  are not harmful to the environment. 
E)  contain carbon.

Question 12

Which statement best describes the difference(s) between structures I and II in this reaction of rhodopsin in the presence of light?   I. Structure II is more linear than structure I. II. Structure I is more linear than structure II.
III) A cis double bond in structure I has been converted to a trans double bond in structure II.
IV) A trans double bond in structure I has been converted to a cis double bond in structure II.

Accepted Answer

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

Question 13

Which of the following is NOT a goal of naming in the IUPAC system?

Accepted Answer

A)  Each structure should have one name. 
B)  Each name should represent one structure. 
C)  It should be possible to draw a chemical structure given the name. 
D)  It should be possible to name any given structure. 
E)  The name should indicate something about the purpose of the molecule. 
A)  Each structure should have one name. 
B)  Each name should represent one structure. 
C)  It should be possible to draw a chemical structure given the name. 
D)  It should be possible to name any given structure. 
E)  The name should indicate something about the purpose of the molecule.

Question 14

Which of the following skeletal line structures has the molecular formula C5H8?

Accepted Answer

A)   
B)   
C)   
D)   
E) None of these structureshas the molecular formula C5H8 
A)   
B)   
C)   
D)   
E) None of these structureshas the molecular formula C5H8

Question 15

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

Accepted Answer

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

Question 16

How many carbon atoms are in a molecule of estradiol, the steroid shown below?

Accepted Answer

The answer of How many carbon atoms are in a...

Question 17

Electrons in benzene are spread out over the six carbons in the molecule. Chemists call these electrons

Accepted Answer

A)  delocalized. 
B)  carcinogenic. 
C)  highly reactive. 
D)  highly unstable. 
E)  resonance electrons. 
A)  delocalized. 
B)  carcinogenic. 
C)  highly reactive. 
D)  highly unstable. 
E)  resonance electrons.

Question 18

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 19

How many hydrogens are bonded to the carbons with the arrows pointing to them?

Accepted Answer

A)  carbon 1: 0 carbon 2: 0 
B)  carbon 1: 0 carbon 2: 2 
C)  carbon 1: 1 carbon 2: 2 
D)  carbon 1: 4 carbon 2: 4 
E)  It is not possible to tell given the skeletal line structure. 
A)  carbon 1: 0 carbon 2: 0 
B)  carbon 1: 0 carbon 2: 2 
C)  carbon 1: 1 carbon 2: 2 
D)  carbon 1: 4 carbon 2: 4 
E)  It is not possible to tell given the skeletal line structure.

Question 20

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

Accepted Answer

A)  They are identical. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are conformers. 
E)  One is an alkene and the other is an alkyne. 
A)  They are identical. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are conformers. 
E)  One is an alkene and the other is an alkyne.

Which of the following structure(s) is represented by the following IUPAC name?

Which of the following compounds contains a heteroatom?

Which skeletal line structure best represents 2-butyne?

Below is an illustration of a molecule of cyclohexane. Which of the following choices best describes why this illustration does not represent cyclohexane accurately?

Which of the following structures is heptane?

Arachidonic acid is a fat found in many foods such as meat, dairy products, and eggs. What type of carbon-carbon double bonds does arachidonic acid contain?

A molecule has the following IUPAC name: 1-hexyne. What does this name mean?

An alkene has _______ a saturated hydrocarbon with the same number of hydrogens.

Which of the following is a saturated hydrocarbon?

Which of the following hydrocarbons are branched and which are straight chains?

Organic chemistry is the study of compounds that

Which of the following is NOT a goal of naming in the IUPAC system?

Which of the following skeletal line structures has the molecular formula C₅H₈?

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

How many carbon atoms are in a molecule of estradiol, the steroid shown below?

Electrons in benzene are spread out over the six carbons in the molecule. Chemists call these electrons

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

How many hydrogens are bonded to the carbons with the arrows pointing to them?

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

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups 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 6: Organic Chemistry: Hydrocarbons

Which of the following structure(s) is represented by the following IUPAC name?

Which of the following compounds contains a heteroatom?

Which skeletal line structure best represents 2-butyne?

Below is an illustration of a molecule of cyclohexane. Which of the following choices best describes why this illustration does not represent cyclohexane accurately?

Which of the following structures is heptane?

Arachidonic acid is a fat found in many foods such as meat, dairy products, and eggs. What type of carbon-carbon double bonds does arachidonic acid contain?

A molecule has the following IUPAC name: 1-hexyne. What does this name mean?

An alkene has _______ a saturated hydrocarbon with the same number of hydrogens.

Which of the following is a saturated hydrocarbon?

Which of the following hydrocarbons are branched and which are straight chains?

Organic chemistry is the study of compounds that

Which of the following is NOT a goal of naming in the IUPAC system?

Which of the following skeletal line structures has the molecular formula C5H8?

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

How many carbon atoms are in a molecule of estradiol, the steroid shown below?

Electrons in benzene are spread out over the six carbons in the molecule. Chemists call these electrons

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

How many hydrogens are bonded to the carbons with the arrows pointing to them?

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

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Which of the following skeletal line structures has the molecular formula C₅H₈?