Question 1

What hybrid atomic orbitals are overlapping to form the carbon-oxygen s bond in acetaldehyde (CH3CHO)?

Accepted Answer

carbon sp²

Question 2

Which of the molecules below has the higher boiling point? Briefly explain your choice.
(CH3)3N or CH3CH2CH2NH2

Accepted Answer

CH₃CH₂CH₂NH₂ has the hig

Question 3

Choose the correct hybridization for the atom indicated in the molecule below.

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  none of the above 
A)  sp 
B)  sp2 
C)  sp3 
D)  none of the above

Question 4

The CCC bond angle in allene (H2C=C=CH2) is approximately what?

Accepted Answer

Question 5

Two p orbitals can overlap to form a s molecular orbital. How many nodes are present in this s molecular orbital?

Accepted Answer

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

Question 6

Choose the functional group which is $\textbf{      not    }$ represented in the structure of RU-486.

Accepted Answer

A)  alkyne 
B)  alcohol 
C)  ketone 
D)  amine 
E)  ether 
A)  alkyne 
B)  alcohol 
C)  ketone 
D)  amine 
E)  ether

Question 7

What is the name of the characteristic functional group found in the molecule CH3CH2COOH?

Accepted Answer

This molecule is a carboxylic

Question 8

Dopamine is shown below. What functional group, or structural element is not present in this compound?

Accepted Answer

A)  hydroxyl 
B)  amino 
C)  methylene 
D)  aromatic ring 
E)  carboxyl 
A)  hydroxyl 
B)  amino 
C)  methylene 
D)  aromatic ring 
E)  carboxyl

Question 9

Consider the interaction of two hydrogen 1s atomic orbitals of the same phase. Which of the statements below is an incorrect description of this interaction?

Accepted Answer

A)  A sigma bonding molecular orbital is formed. 
B)  The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital. 
C)  The molecular orbital formed has a node between the atoms. 
D)  The molecular orbital formed is cylindrically symmetric. 
E)  A maximum of two electrons may occupy the molecular orbital formed. 
A)  A sigma bonding molecular orbital is formed. 
B)  The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital. 
C)  The molecular orbital formed has a node between the atoms. 
D)  The molecular orbital formed is cylindrically symmetric. 
E)  A maximum of two electrons may occupy the molecular orbital formed.

Question 10

Which of the following statements about π molecular orbitals is/are correct?

Accepted Answer

A)  π molecular orbitals are cylindrically symmetric. 
B)  Most of the electron density in a π molecular orbital is centered above and below the internuclear axis. 
C)  When two atoms are connected by a double bond, both of these bonds are π bonds. 
D)  Both statements B and C are correct. 
E)  Statements A, B, and C are all correct. 
A)  π molecular orbitals are cylindrically symmetric. 
B)  Most of the electron density in a π molecular orbital is centered above and below the internuclear axis. 
C)  When two atoms are connected by a double bond, both of these bonds are π bonds. 
D)  Both statements B and C are correct. 
E)  Statements A, B, and C are all correct.

Question 11

The structure of vitamin C is shown below. Which one of the following statements concerning this structure is not correct?

Accepted Answer

A)  The molecule contains 2 pi bonds. 
B)  The molecule contains sp3 hybridized oxygen atoms. 
C)  The molecule contains 3 sp2 hybridized carbon atoms. 
D)  The molecule can be classified as an aldehyde. 
E)  The molecule contains more than one hydroxyl group. 
A)  The molecule contains 2 pi bonds. 
B)  The molecule contains sp3 hybridized oxygen atoms. 
C)  The molecule contains 3 sp2 hybridized carbon atoms. 
D)  The molecule can be classified as an aldehyde. 
E)  The molecule contains more than one hydroxyl group.

Question 12

Which of the molecules below can be properly called an amine?

Accepted Answer

A)  CH3CN 
B)  CH3COOH 
C)  CH3CH2CH2OH 
D)  CH3CH2NHCH3 
E)  CH3CH2CH2NO2 
A)  CH3CN 
B)  CH3COOH 
C)  CH3CH2CH2OH 
D)  CH3CH2NHCH3 
E)  CH3CH2CH2NO2

Question 13

Do any of the six-membered rings present in RU-486 have the structural features which characterize an aromatic hydrocarbon?

Accepted Answer

The answer of Do any of the six-membered rings present...

Question 14

Complete the structure of methyl azide by adding any necessary formal charges.

Accepted Answer

The answer of Complete the structure of methyl azide by...

Question 15

What name is given to a hydrocarbon that contains a carbon-carbon triple bond?

Accepted Answer

A)  alkane 
B)  alkene 
C)  alkyne 
D)  aromatic 
E)  none of the above 
A)  alkane 
B)  alkene 
C)  alkyne 
D)  aromatic 
E)  none of the above

Question 16

Which one of the molecules shown below has a net molecular dipole moment?

Accepted Answer

A)  CCl4 
B)  CO2 
C)  CH3CCl3 
D)  BeCl2 
A)  CCl4 
B)  CO2 
C)  CH3CCl3 
D)  BeCl2

Question 17

Are the two compounds shown below best described as cis-trans isomers, constitutional isomers, or not isomeric?

Accepted Answer

The answer of Are the two compounds shown below best...

Question 18

What kind of molecular orbital (σ, σ*, π, or π*) results when the two atomic orbitals shown below interact in the manner indicated?

Accepted Answer

Question 19

Provide the structure of an aromatic compound with seven carbon atoms.

Accepted Answer

The answer of Provide the structure of an aromatic compound...

Question 20

Draw the three-dimensional structure of chloroform (CHCl3) and show the direction of the molecular dipole moment.

Accepted Answer

The answer of Draw the three-dimensional structure of chloroform (CHCl3)...

Exam 2: Structure and Properties of Organic Molecules

What hybrid atomic orbitals are overlapping to form the carbon-oxygen s bond in acetaldehyde (CH3CHO)?

Which of the molecules below has the higher boiling point? Briefly explain your choice. (CH3)3N or CH3CH2CH2NH2

Choose the correct hybridization for the atom indicated in the molecule below.

The CCC bond angle in allene (H2C=C=CH2) is approximately what?

Two p orbitals can overlap to form a s molecular orbital. How many nodes are present in this s molecular orbital?

Choose the functional group which is not \textbf{ not } not represented in the structure of RU-486.

What is the name of the characteristic functional group found in the molecule CH3CH2COOH?

Dopamine is shown below. What functional group, or structural element is not present in this compound?

Consider the interaction of two hydrogen 1s atomic orbitals of the same phase. Which of the statements below is an incorrect description of this interaction?

Which of the following statements about π molecular orbitals is/are correct?

The structure of vitamin C is shown below. Which one of the following statements concerning this structure is not correct?

Which of the molecules below can be properly called an amine?

Do any of the six-membered rings present in RU-486 have the structural features which characterize an aromatic hydrocarbon?

Complete the structure of methyl azide by adding any necessary formal charges.

What name is given to a hydrocarbon that contains a carbon-carbon triple bond?

Which one of the molecules shown below has a net molecular dipole moment?

Are the two compounds shown below best described as cis-trans isomers, constitutional isomers, or not isomeric?

What kind of molecular orbital (σ, σ*, π, or π*) results when the two atomic orbitals shown below interact in the manner indicated?

Provide the structure of an aromatic compound with seven carbon atoms.

Draw the three-dimensional structure of chloroform (CHCl3) and show the direction of the molecular dipole moment.

Introduction and Review

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides: Nucleophilic Substitution and Elimination

Structure and Synthesis of Alkenes

Reactions of Alkenes

Alkynes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

What hybrid atomic orbitals are overlapping to form the carbon-oxygen s bond in acetaldehyde (CH₃CHO)?

Which of the molecules below has the higher boiling point? Briefly explain your choice. (CH₃)₃N or CH₃CH₂CH₂NH₂

The CCC bond angle in allene (H₂C=C=CH₂) is approximately what?

Choose the functional group which is $\textbf{ not }$ represented in the structure of RU-486.

What is the name of the characteristic functional group found in the molecule CH₃CH₂COOH?

What kind of molecular orbital (σ, σ^, π, or π^) results when the two atomic orbitals shown below interact in the manner indicated?

Draw the three-dimensional structure of chloroform (CHCl₃) and show the direction of the molecular dipole moment.