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

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

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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

Question 4

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

Accepted Answer

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Question 5

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

Accepted Answer

The answer of Boron trifluoride (BF₃) is a molecule in...

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

Question 7

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

Accepted Answer

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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

Question 9

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

Accepted Answer

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Question 10

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

Accepted Answer

The answer of From a molecular orbital perspective, why is...

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.

Question 12

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

Accepted Answer

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Question 13

Circle the coplanar atoms in 1-ethylcyclopentene shown below.

Accepted Answer

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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

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Question 15

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

Accepted Answer

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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

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 ↑

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 ↑

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 ↑