Question 1

Choose the correct hybridization for the atom indicated in the molecule below.
(CH3)2CHCN
↑

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 2

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 3

How many carbon-carbon σ bonds are present in the molecule shown?

Accepted Answer

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

Question 4

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 5

Boron trifluoride (BF3) is a molecule in which the boron atom is ________ hybridized and the FBF bond angle is ________.

Accepted Answer

Question 6

Acrylonitrile (CH2=CHCN) contains ________ σ bonds and ________ π bonds.

Accepted Answer

A)  4; 1 
B)  6; 3 
C)  4; 3 
D)  6; 1 
E)  2; 0 
A)  4; 1 
B)  6; 3 
C)  4; 3 
D)  6; 1 
E)  2; 0

Question 7

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

Accepted Answer

Question 8

Choose the functional group which is not represented in the structure of Lipitor (TM).

Accepted Answer

A)  carboxylic acid 
B)  nitrile 
C)  aromatic hydrocarbon 
D)  amide 
E)  None of the above 
A)  carboxylic acid 
B)  nitrile 
C)  aromatic hydrocarbon 
D)  amide 
E)  None of the above

Question 9

Structures which differ only in rotations about a single bond are called ________.

Accepted Answer

The answer of Structures which differ only in rotations about...

Question 10

From a molecular orbital perspective, why is there relatively free rotation about the carbon-carbon bond of ethane (CH3CH3)?

Accepted Answer

This carbon-carbon σ bond is f

Question 11

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 12

Draw the structure of the isomeric form of 1,2-dichloroethene (CHCl   
CHCl) which has no net dipole moment.

Accepted Answer

The answer of Draw the structure of the isomeric form...

Question 13

Circle the coplanar atoms in 1-ethylcyclopentene shown below.

Accepted Answer

The answer of Circle the coplanar atoms in 1-ethylcyclopentene shown...

Question 14

Calculate the charge separation for a C-O bond if the bond distance is 1.43 A and the bond dipole is 0.86 D.

Accepted Answer

μ= 4.8 x δ

Question 15

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 16

Choose the correct hybridization for the atom indicated in the molecule below.
CH3CH2CH2CH3
↑

Accepted Answer

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

Exam 2: Acids and Bases; Functional Groups

Choose the correct hybridization for the atom indicated in the molecule below. (CH3)2CHCN ↑

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

How many carbon-carbon σ bonds are present in the molecule shown?

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

Boron trifluoride (BF3) is a molecule in which the boron atom is ________ hybridized and the FBF bond angle is ________.

Acrylonitrile (CH2=CHCN) contains ________ σ bonds and ________ π bonds.

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

Choose the functional group which is not represented in the structure of Lipitor (TM).

Structures which differ only in rotations about a single bond are called ________.

From a molecular orbital perspective, why is there relatively free rotation about the carbon-carbon bond of ethane (CH3CH3)?

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?

Draw the structure of the isomeric form of 1,2-dichloroethene (CHCl CHCl) which has no net dipole moment.

Circle the coplanar atoms in 1-ethylcyclopentene shown below.

Calculate the charge separation for a C-O bond if the bond distance is 1.43 A and the bond dipole is 0.86 D.

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

Choose the correct hybridization for the atom indicated in the molecule below. CH3CH2CH2CH3 ↑

Structure and Bonding

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

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

Choose the correct hybridization for the atom indicated in the molecule below. (CH₃)₂CHCN ↑

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

Boron trifluoride (BF₃) is a molecule in which the boron atom is hybridized and the FBF bond angle is .

Acrylonitrile (CH₂=CHCN) contains σ bonds and π bonds.

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

From a molecular orbital perspective, why is there relatively free rotation about the carbon-carbon bond of ethane (CH₃CH₃)?

Choose the correct hybridization for the atom indicated in the molecule below. CH₃CH₂CH₂CH₃ ↑