Question 1

The nitrosonium ion, NO+, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which statement about NO+ is correct?

Accepted Answer

A)   NO+ has a bond order of 2 and is paramagnetic.
B)   NO+ has a bond order of 2 and is diamagnetic.
C)   NO+ has a bond order of 3 and is paramagnetic.
D)   NO+ has a bond order of 3 and is diamagnetic.
E)   NO+ has a bond order of 2.5 and is neither paramagnetic nor diamagnetic.F) C) and D)
G) None of the above

Question 2

In the valence bond treatment, a π bond is formed when two p orbitals overlap side to side.

Accepted Answer

A) True 
 B)False

Question 3

According to molecular orbital (MO)  theory, the twelve valence electrons in the O2 molecule are distributed as follows:

Accepted Answer

A)   12 in bonding MOs, 0 in antibonding MOs.
B)   10 in bonding MOs, 2 in antibonding MOs.
C)   9 in bonding MOs, 3 in antibonding MOs.
D)   8 in bonding MOs, 4 in antibonding MOs.
E)   7 in bonding MOs, 5 in antibonding MOs.F) A) and B)
G) A) and C)

Question 4

What is the molecular geometry of XeO2F2 as predicted by the VSEPR model? 2F2 as predicted by the VSEPR model?   A)  square planar B)  tetrahedral C)  square pyramidal D)  seesaw E)  octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   square planar
B)   tetrahedral
C)   square pyramidal
D)   seesaw
E)   octahedralF) B) and E)
G) D) and E)

Question 5

What is the total number of electron domains around the central atom for a molecule having a T-shaped molecular geometry, such as BrF3?

Accepted Answer

A)   5
B)   2
C)   3
D)   4
E)   6F) C) and D)
G) All of the above A

Question 6

According to the VSEPR model, is the molecule PF5 polar or nonpolar?

Accepted Answer

Question 7

The angles between sp2 hybrid orbitals are 109.5°.

Accepted Answer

A) True 
 B)False

Question 8

According to the VSEPR model, a molecule with the general formula AB5 with one lone pair on the central atom will have a ________ molecular geometry.

Accepted Answer

A)   tetrahedral
B)   trigonal bipyramidal
C)   square pyramidal
D)   octahedral
E)   seesawF) A) and D)
G) A) and C)

Question 9

Thiocarbonyl disulfide (CSF2) , based on the coordinate axes provided below, in which direction does the net molecular dipole moment point for the molecule? 2) , based on the coordinate axes provided below, in which direction does the net molecular dipole moment point for the molecule?   A)  It points in the +x direction. B)  It points in the -x direction. C)  It points in the +y direction. D)  It points in the -y direction. E)  The molecule does not have a net molecular dipole moment." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   It points in the +x direction.
B)   It points in the -x direction.
C)   It points in the +y direction.
D)   It points in the -y direction.
E)   The molecule does not have a net molecular dipole moment.F) A) and E)
G) A) and D)

Question 10

Carbon uses ________ hybrid orbitals in ClCN.

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   sp3d2F) A) and B)
G) B) and E)

Question 11

What is the molecular geometry of NO2- as predicted by the VSEPR model?

Accepted Answer

A)   linear
B)   trigonal planar
C)   bent
D)   tetrahedral
E)   trigonal pyramidalF) D) and E)
G) None of the above

Question 12

Which is the most reasonable prediction for the H-O-H bond angle in H2O?

Accepted Answer

A)   90°
B)   109.5°
C)   120°
D)   107°
E)   105°F) A) and D)
G) C) and E)

Question 13

How do you describe the molecular geometry of a molecule that has more than one central atom?

Accepted Answer

A)   You describe the molecular geometry around the most electronegative atom.
B)   You describe the molecular geometry around each central atom separately.
C)   You describe the molecular geometry around the most electropositive atom.
D)   You describe the molecular geometry around the atom with the largest atomic radius.
E)   You describe the molecular geometry around the atom with the largest bond angle.F) A) and C)
G) None of the above

Question 14

To make an sp3 hybrid orbital, one s atomic orbital is mixed with three p atomic orbitals.

Accepted Answer

A) True 
 B)False

Question 15

Which is true for carbon monoxide?

Accepted Answer

A)   CO has a short CO bond.
B)   CO has a zero dipole moment.
C)   The bond energy in CO is low.
D)   The atoms in CO cannot obey the octet rule.
E)   All of these are true about CO.F) B) and E)
G) A) and D)

Question 16

What is the molecular geometry of N2O as predicted by the VSEPR model? 2O as predicted by the VSEPR model?   A)  trigonal pyramidal B)  trigonal planar C)  tetrahedral D)  bent E)  linear" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   trigonal pyramidal
B)   trigonal planar
C)   tetrahedral
D)   bent
E)   linearF) None of the above
G) B) and C)

Question 17

Predict the molecular geometry and polarity of the SO2 molecule.

Accepted Answer

A)   linear, polar
B)   linear, nonpolar
C)   bent, polar
D)   bent, nonpolar
E)   trigonal planar, polarF) B) and C)
G) All of the above

Question 18

The Lewis structure of formaldehyde, CH2O, is shown. Use VSEPR model to predict the molecular geometry and the H-C-H bond angle. Outline your reasoning.

Accepted Answer

There are three electron groups around t...

Question 19

Which one of the following molecules is nonpolar?

Accepted Answer

A)   CO2
B)   PF3
C)   KCl
D)   IBr3
E)   CHCl3F) A) and B)
G) A) and C) A

Question 20

How many bonds are there in one molecule of 1,5-hexadiyne (shown below) ?

Accepted Answer

A)   2
B)   4
C)   6
D)   11
E)   15F) All of the above
G) C) and D) B

Exam 9: Chemical Bonding II: Molecular Geometry and Bonding Theories

The nitrosonium ion, NO+, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which statement about NO+ is correct?

Correct AnswerverifiedShow Answer

In the valence bond treatment, a π bond is formed when two p orbitals overlap side to side.

Correct AnswerverifiedShow Answer

According to molecular orbital (MO) theory, the twelve valence electrons in the O2 molecule are distributed as follows:

Correct AnswerverifiedShow Answer

What is the molecular geometry of XeO2F2 as predicted by the VSEPR model?

Correct AnswerverifiedShow Answer

What is the total number of electron domains around the central atom for a molecule having a T-shaped molecular geometry, such as BrF3?

Correct AnswerverifiedA

According to the VSEPR model, is the molecule PF5 polar or nonpolar?

Correct AnswerverifiedShow Answer

The angles between sp2 hybrid orbitals are 109.5°.

Correct AnswerverifiedShow Answer

According to the VSEPR model, a molecule with the general formula AB5 with one lone pair on the central atom will have a ________ molecular geometry.

Correct AnswerverifiedShow Answer

Thiocarbonyl disulfide (CSF2) , based on the coordinate axes provided below, in which direction does the net molecular dipole moment point for the molecule?

Correct AnswerverifiedShow Answer

Carbon uses ________ hybrid orbitals in ClCN.

Correct AnswerverifiedShow Answer

What is the molecular geometry of NO2- as predicted by the VSEPR model?

Correct AnswerverifiedShow Answer

Which is the most reasonable prediction for the H-O-H bond angle in H2O?

Correct AnswerverifiedShow Answer

How do you describe the molecular geometry of a molecule that has more than one central atom?

Correct AnswerverifiedShow Answer

To make an sp3 hybrid orbital, one s atomic orbital is mixed with three p atomic orbitals.

Correct AnswerverifiedShow Answer

Which is true for carbon monoxide?

Correct AnswerverifiedShow Answer

What is the molecular geometry of N2O as predicted by the VSEPR model?

Correct AnswerverifiedShow Answer

Predict the molecular geometry and polarity of the SO2 molecule.

Correct AnswerverifiedShow Answer

The Lewis structure of formaldehyde, CH2O, is shown. Use VSEPR model to predict the molecular geometry and the H-C-H bond angle. Outline your reasoning.

Correct AnswerverifiedThere are three electron groups around t...View AnswerShow Answer

Which one of the following molecules is nonpolar?

Correct AnswerverifiedA

How many bonds are there in one molecule of 1,5-hexadiyne (shown below) ?

Correct AnswerverifiedB

The nitrosonium ion, NO⁺, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which statement about NO⁺is correct?

Correct Answer
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According to molecular orbital (MO) theory, the twelve valence electrons in the O₂ molecule are distributed as follows:

Correct Answer
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What is the molecular geometry of XeO₂F₂ as predicted by the VSEPR model?

Correct Answer
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What is the total number of electron domains around the central atom for a molecule having a T-shaped molecular geometry, such as BrF₃?

Correct Answer
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A

According to the VSEPR model, is the molecule PF₅ polar or nonpolar?

Correct Answer
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The angles between sp² hybrid orbitals are 109.5°.

Correct Answer
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According to the VSEPR model, a molecule with the general formula AB₅ with one lone pair on the central atom will have a ________ molecular geometry.

Correct Answer
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Thiocarbonyl disulfide (CSF₂) , based on the coordinate axes provided below, in which direction does the net molecular dipole moment point for the molecule?

Correct Answer
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What is the molecular geometry of NO₂^- as predicted by the VSEPR model?

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Which is the most reasonable prediction for the H-O-H bond angle in H₂O?

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To make an sp³ hybrid orbital, one s atomic orbital is mixed with three p atomic orbitals.

Correct Answer
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What is the molecular geometry of N₂O as predicted by the VSEPR model?

Correct Answer
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Predict the molecular geometry and polarity of the SO₂ molecule.

Correct Answer
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The Lewis structure of formaldehyde, CH₂O, is shown. Use VSEPR model to predict the molecular geometry and the H-C-H bond angle. Outline your reasoning.

Correct Answer
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There are three electron groups around t...
View Answer

Correct Answer
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A

Correct Answer
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B