Question 1

Which of the following pairs are constitutional isomers?

Accepted Answer

A)  CH3CH=CHCH2OH and CH3CH=CHOCH3 
B)  ClCH2CH2CH2CH3 and CH3CH2CH2CH2Cl 
C)  CH3CH(OH)CH2CH3 and CH3CH2(HO)CHCH3 
D)  H2NCH2CH=CHCOOH and HOOCCH=CH(H2N)CH2 
E)  CH3OCH2CH2CH2CH3 and CH3OCH2CH2CH2OCH3 
A)  CH3CH=CHCH2OH and CH3CH=CHOCH3 
B)  ClCH2CH2CH2CH3 and CH3CH2CH2CH2Cl 
C)  CH3CH(OH)CH2CH3 and CH3CH2(HO)CHCH3 
D)  H2NCH2CH=CHCOOH and HOOCCH=CH(H2N)CH2 
E)  CH3OCH2CH2CH2CH3 and CH3OCH2CH2CH2OCH3

Question 2

What is the index of hydrogen deficiency in C9H16Br2?

Accepted Answer

A)  5 
B)  4 
C)  3 
D)  2 
E)  1 
A)  5 
B)  4 
C)  3 
D)  2 
E)  1

Question 3

Which of the following condensed general formulas represents alcohols?

Accepted Answer

A)  ROR 
B)  RCOR 
C)  RCHO 
D)  ROH 
E)  RCOOH 
A)  ROR 
B)  RCOR 
C)  RCHO 
D)  ROH 
E)  RCOOH

Question 4

Which of the following statements regarding functional groups and families is TRUE?

Accepted Answer

A)  A group of organic compounds forms a family if they share the same characteristic carbon atom backbone called the functional group. 
B)  A group of organic compounds forms a family if they share the same characteristic atom or a group of atoms called the functional group. 
C)  A group of organic compounds forms a family if they differ by one CH group, called the functional group, in their structure. 
D)  A family of organic compounds are all structural isomers with the same molecular formula called the functional group formula. 
E)  A family of organic compounds is composed of all isomers that have the same molecular formula and share the same characteristic atom or a group of atoms called the functional group. 
A)  A group of organic compounds forms a family if they share the same characteristic carbon atom backbone called the functional group. 
B)  A group of organic compounds forms a family if they share the same characteristic atom or a group of atoms called the functional group. 
C)  A group of organic compounds forms a family if they differ by one CH group, called the functional group, in their structure. 
D)  A family of organic compounds are all structural isomers with the same molecular formula called the functional group formula. 
E)  A family of organic compounds is composed of all isomers that have the same molecular formula and share the same characteristic atom or a group of atoms called the functional group.

Question 5

Which of the following compounds is an aldehyde?

Accepted Answer

A)  CH3CH2CH=O 
B)  CH3CH2CH2CO2H 
C)  CH3CO2CH3 
D)  CH3-O-CH3 
E)  CH2OH-CH2OH 
A)  CH3CH2CH=O 
B)  CH3CH2CH2CO2H 
C)  CH3CO2CH3 
D)  CH3-O-CH3 
E)  CH2OH-CH2OH

Question 6

What does the term "racemic mixture" mean?

Accepted Answer

A mixture (equal in mole ratio

Question 7

What is the maximum number of covalent bonds that a carbon atom can form?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 8

Explain the formation of triple bonds in alkynes. Make sure to mention the hybridization of carbon atoms.

Accepted Answer

The C-C triple bond is made of one σ and

Question 9

Which of the following compounds is an ether?

Accepted Answer

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

Question 10

Which of the following molecules is the least polar?

Accepted Answer

A)  octanol 
B)  cyclohexane 
C)  ethylamine 
D)  dodecanol 
E)  cyclohexanone 
A)  octanol 
B)  cyclohexane 
C)  ethylamine 
D)  dodecanol 
E)  cyclohexanone

Question 11

Which of the following compounds exhibits optical isomerism?

Accepted Answer

A)  CH3-CH2-CH3 
B)  CH3-CH2-CHBr-CH2-CH3 
C)  CH3-CHCl-CH3 
D)  CH3-CH2-CHBr-CH3 
E)  CH3-CH2-CBr2-CH3 
A)  CH3-CH2-CH3 
B)  CH3-CH2-CHBr-CH2-CH3 
C)  CH3-CHCl-CH3 
D)  CH3-CH2-CHBr-CH3 
E)  CH3-CH2-CBr2-CH3

Question 12

Why are there so many more carbon compounds than the number of compounds made up of all the rest of the elements combined?

Accepted Answer

Carbon has the ability to form

Question 13

Identify the generic formula for alkanes.

Accepted Answer

A)  CnH2n+2 
B)  CnH2n-2 
C)  CnH2n 
D)  CnH2n-4 
E)  CnH2n+4 
A)  CnH2n+2 
B)  CnH2n-2 
C)  CnH2n 
D)  CnH2n-4 
E)  CnH2n+4

Question 14

Which of the following is a secondary alcohol?

Accepted Answer

A)  CH3CH2OH 
B)  (CH3)2(CH3CH2)COH 
C)  (CH3)3COH 
D)  (CH3)2CHCH(CH3)OH 
E)  CH3OCH3 
A)  CH3CH2OH 
B)  (CH3)2(CH3CH2)COH 
C)  (CH3)3COH 
D)  (CH3)2CHCH(CH3)OH 
E)  CH3OCH3

Question 15

Determine the absolute configuration of the molecule shown below:

Accepted Answer

A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  l configuration 
A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  l configuration

Question 16

Which one of the following molecules is the most polar?

Accepted Answer

A)  butane 
B)  acetic acid 
C)  cyclohexane 
D)  methanol 
E)  cyclohexanone 
A)  butane 
B)  acetic acid 
C)  cyclohexane 
D)  methanol 
E)  cyclohexanone

Question 17

Determine the absolute configuration of the molecule shown below:

Accepted Answer

A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  l configuration 
A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  l configuration

Question 18

Which of the following Newman projections shows an antistaggered conformation of n-pentane?

Accepted Answer

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

Question 19

Which of the following compounds contain an acyl group?

Accepted Answer

A)  esters, ethers, carboxylic acids 
B)  esters, carboxylic acids, amines 
C)  esters, carboxylic acids, amides 
D)  esters, alcohols, amines 
E)  ethers, amides, esters 
A)  esters, ethers, carboxylic acids 
B)  esters, carboxylic acids, amines 
C)  esters, carboxylic acids, amides 
D)  esters, alcohols, amines 
E)  ethers, amides, esters

Question 20

Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4)?

Accepted Answer

A)  -CH3, -CH=CH2, -CH2CH3, -Cl 
B)  -CH3, -CH2CH3, -CH=CH2, -Cl 
C)  -Cl, -CH2CH3, -CH3, -CH=CH2 
D)  -Cl, -CH2CH3, -CH=CH2, -CH3 
E)  -Cl, -CH=CH2, -CH2CH3, -CH3 
A)  -CH3, -CH=CH2, -CH2CH3, -Cl 
B)  -CH3, -CH2CH3, -CH=CH2, -Cl 
C)  -Cl, -CH2CH3, -CH3, -CH=CH2 
D)  -Cl, -CH2CH3, -CH=CH2, -CH3 
E)  -Cl, -CH=CH2, -CH2CH3, -CH3

Exam 20: Organic Chemistry I: Structures

Which of the following pairs are constitutional isomers?

What is the index of hydrogen deficiency in C9H16Br2?

Which of the following condensed general formulas represents alcohols?

Which of the following statements regarding functional groups and families is TRUE?

Which of the following compounds is an aldehyde?

What does the term "racemic mixture" mean?

What is the maximum number of covalent bonds that a carbon atom can form?

Explain the formation of triple bonds in alkynes. Make sure to mention the hybridization of carbon atoms.

Which of the following compounds is an ether?

Which of the following molecules is the least polar?

Which of the following compounds exhibits optical isomerism?

Why are there so many more carbon compounds than the number of compounds made up of all the rest of the elements combined?

Identify the generic formula for alkanes.

Which of the following is a secondary alcohol?

Determine the absolute configuration of the molecule shown below:

Which one of the following molecules is the most polar?

Determine the absolute configuration of the molecule shown below:

Which of the following Newman projections shows an antistaggered conformation of n-pentane?

Which of the following compounds contain an acyl group?

Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4)?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the index of hydrogen deficiency in C₉H₁₆Br₂?