Question 1

Find the correct stereochemistries for the following four alkenes:

Accepted Answer

A) A is Z,B is Z,C is E,D is E 
B) A is Z,B is E,C is Z,D is E 
C) A is E,B is E,C is Z,D is E 
D) A is E,B is E,C is Z,D is Z 
E) A is Z,B is Z,C is E,D is Z 
A) A is Z,B is Z,C is E,D is E 
B) A is Z,B is E,C is Z,D is E 
C) A is E,B is E,C is Z,D is E 
D) A is E,B is E,C is Z,D is Z 
E) A is Z,B is Z,C is E,D is Z D

Question 2

What are skew conformations?

Accepted Answer

A) Skew conformations all possible conformations between the eclipsed and staggered extremes. 
B) Skew conformations in which linear molecules get twisted. 
C) Skew conformations are conformations that have the greatest energy. 
D) Skew conformations are conformations that have the lowest energy. 
E) Skew conformations are conformations that have the greatest energy barrier. 
A) Skew conformations all possible conformations between the eclipsed and staggered extremes. 
B) Skew conformations in which linear molecules get twisted. 
C) Skew conformations are conformations that have the greatest energy. 
D) Skew conformations are conformations that have the lowest energy. 
E) Skew conformations are conformations that have the greatest energy barrier. A

Question 3

What is the correct IUPAC name for the following structure?

Accepted Answer

A) 2-ethyl-3-methylheptane 
B) 3,5-dimethyloctane 
C) 4-methyl-6-ethylheptane 
D) 4,6-dimethyloctane 
E) 3,5-dimethyloctyl 
A) 2-ethyl-3-methylheptane 
B) 3,5-dimethyloctane 
C) 4-methyl-6-ethylheptane 
D) 4,6-dimethyloctane 
E) 3,5-dimethyloctyl B

Question 4

Name the following compound: CH3CH2NHCH3.

Accepted Answer

A) aminopropane 
B) aminomethylethane 
C) methylaminoethane 
D) propylamine 
E) ethylmethylamine 
A) aminopropane 
B) aminomethylethane 
C) methylaminoethane 
D) propylamine 
E) ethylmethylamine

Question 5

Which class of compounds is most oxidized?

Accepted Answer

A) alkanes 
B) alcohols 
C) carboxylic acids 
D) aldehydes 
E) ketones 
A) alkanes 
B) alcohols 
C) carboxylic acids 
D) aldehydes 
E) ketones

Question 6

If an ethyl group is substituted for one hydrogen of cyclohexane,what would be the preferred position of that ethyl substituent on the ring?

Accepted Answer

A) axial position 
B) equatorial position 
C) chair position 
D) boat position 
E) twist boat conformation 
A) axial position 
B) equatorial position 
C) chair position 
D) boat position 
E) twist boat conformation

Question 7

What class of amine is found in the analgesic codeine (shown below)?

Accepted Answer

A) tertiary amine 
B) secondary amine 
C) aromatic amine 
D) quaternary amine 
E) dimethylamine 
A) tertiary amine 
B) secondary amine 
C) aromatic amine 
D) quaternary amine 
E) dimethylamine

Question 8

Give the name for CH3CH =CHCH3.

Accepted Answer

A) 3-butene 
B) 2-butene 
C) 2-propene 
D) 2-pentene 
E) 2-butane 
A) 3-butene 
B) 2-butene 
C) 2-propene 
D) 2-pentene 
E) 2-butane

Question 9

Calculate the degree of unsaturation for the following molecules:
Molecule I: C3H4
Molecule II: C5H10
Molecule III: C4H6

Accepted Answer

A) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 1. 
B) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 0 and for molecule III the degree of unsaturation is 2. 
C) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 2. 
D) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 2 and for molecule III the degree of unsaturation is 2. 
E) For molecule I the degree of unsaturation is 1,for molecule II the degree of unsaturation is 2 and for molecule III the degree of unsaturation is 1. 
A) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 1. 
B) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 0 and for molecule III the degree of unsaturation is 2. 
C) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 1 and for molecule III the degree of unsaturation is 2. 
D) For molecule I the degree of unsaturation is 2,for molecule II the degree of unsaturation is 2 and for molecule III the degree of unsaturation is 2. 
E) For molecule I the degree of unsaturation is 1,for molecule II the degree of unsaturation is 2 and for molecule III the degree of unsaturation is 1.

Question 10

How many different structural isomers are there of the compound dichlorobutane?

Accepted Answer

A) 6 
B) 8 
C) 9 
D) 5 
E) 7 
A) 6 
B) 8 
C) 9 
D) 5 
E) 7

Question 11

The compound with formula C4H9N has two degrees of unsaturation.

Accepted Answer

A) True 
 B)False

Question 12

What are the possible positions for hydrogen on the chair conformation of cyclohexane?

Accepted Answer

A) staggered and eclipsed 
B) axial and equatorial 
C) equatorial and apical 
D) longitudinal and latitudinal 
E) chair and boat 
A) staggered and eclipsed 
B) axial and equatorial 
C) equatorial and apical 
D) longitudinal and latitudinal 
E) chair and boat

Question 13

Different forms of isomerism in organic compounds can be summarized as follows:
"Isomers can be constitutional or stereoisomers.Constitutional isomers are further divided in enantiomers and diastereomers."

Accepted Answer

A) True 
 B)False

Question 14

How many chiral carbon atoms can you find in the molecule below?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 15

When determining the priority of substituents is "A substituent atom of higher atomic number has higher priority over a substituent atom with lower atomic number."

Accepted Answer

A) True 
 B)False

Question 16

Give the name for HCOOH.

Accepted Answer

A) methanone 
B) methanal 
C) ethanoic or acetic acid 
D) methanaldehyde 
E) methanoic or formic acid 
A) methanone 
B) methanal 
C) ethanoic or acetic acid 
D) methanaldehyde 
E) methanoic or formic acid

Question 17

Which of the following is the most soluble in water?

Accepted Answer

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

Question 18

How many primary,secondary,tertiary and quaternary carbon atoms are there in the structure of 2,4,6-trimetylheptane?

Accepted Answer

A) 5 primary,2 secondary,2 tertiary and 1 quaternary carbon atoms 
B) 5 primary,3 secondary,2 tertiary and 0 quaternary carbon atoms 
C) 4 primary,4 secondary,2 tertiary and 0 quaternary carbon atoms 
D) 4 primary,2 secondary,2 tertiary and 2 quaternary carbon atoms 
E) 5 primary,2 secondary,3 tertiary and 0 quaternary carbon atoms 
A) 5 primary,2 secondary,2 tertiary and 1 quaternary carbon atoms 
B) 5 primary,3 secondary,2 tertiary and 0 quaternary carbon atoms 
C) 4 primary,4 secondary,2 tertiary and 0 quaternary carbon atoms 
D) 4 primary,2 secondary,2 tertiary and 2 quaternary carbon atoms 
E) 5 primary,2 secondary,3 tertiary and 0 quaternary carbon atoms

Question 19

Can 1,3,5-hexatriene be considered an aromatic compound? Why do you think so?

Accepted Answer

A) Yes,because it contains alternating double and single bonds. 
B) No,because the molecule is not a flat ring. 
C) Yes,because its double bonds contain 4n+2 electrons (n = 1). 
D) No,because the structure is not based on benzene ring. 
E) Yes,because the molecule has a delocalized π electron cloud. 
A) Yes,because it contains alternating double and single bonds. 
B) No,because the molecule is not a flat ring. 
C) Yes,because its double bonds contain 4n+2 electrons (n = 1). 
D) No,because the structure is not based on benzene ring. 
E) Yes,because the molecule has a delocalized π electron cloud.

Question 20

To produce an organic ester,one uses a carboxylic acid and a(n)________.

Accepted Answer

A) alkyl halide 
B) alkane 
C) alcohol 
D) aldehyde 
E) ketone 
A) alkyl halide 
B) alkane 
C) alcohol 
D) aldehyde 
E) ketone

Exam 26: Structures of Organic Compounds

Find the correct stereochemistries for the following four alkenes:

What are skew conformations?

What is the correct IUPAC name for the following structure?

Name the following compound: CH3CH2NHCH3.

Which class of compounds is most oxidized?

If an ethyl group is substituted for one hydrogen of cyclohexane,what would be the preferred position of that ethyl substituent on the ring?

What class of amine is found in the analgesic codeine (shown below)?

Give the name for CH3CH =CHCH3.

Calculate the degree of unsaturation for the following molecules: Molecule I: C3H4 Molecule II: C5H10 Molecule III: C4H6

How many different structural isomers are there of the compound dichlorobutane?

The compound with formula C4H9N has two degrees of unsaturation.

What are the possible positions for hydrogen on the chair conformation of cyclohexane?

Different forms of isomerism in organic compounds can be summarized as follows: "Isomers can be constitutional or stereoisomers.Constitutional isomers are further divided in enantiomers and diastereomers."

How many chiral carbon atoms can you find in the molecule below?

When determining the priority of substituents is "A substituent atom of higher atomic number has higher priority over a substituent atom with lower atomic number."

Give the name for HCOOH.

Which of the following is the most soluble in water?

How many primary,secondary,tertiary and quaternary carbon atoms are there in the structure of 2,4,6-trimetylheptane?

Can 1,3,5-hexatriene be considered an aromatic compound? Why do you think so?

To produce an organic ester,one uses a carboxylic acid and a(n)________.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Name the following compound: CH₃CH₂NHCH₃.

Give the name for CH₃CH =CHCH₃.

Calculate the degree of unsaturation for the following molecules: Molecule I: C₃H₄ Molecule II: C₅H₁₀ Molecule III: C₄H₆

The compound with formula C₄H₉N has two degrees of unsaturation.