Question 1

Which one of the following molecules is polar?

Accepted Answer

A)  CH4
B)  CHBr3
C)  F2
D)  CBr4
E)  CO2F) None of the above
G) A) and C)

Question 2

Using the VSEPR model, predict the molecular geometry around the central atom in SO32−.

Accepted Answer

A)  trigonal planar
B)  trigonal pyramidal
C)  tetrahedral
D)  trigonal bipyramidal
E)  octahedralF) A) and C)
G) A) and D)

Question 3

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

Accepted Answer

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

Question 4

What is wrong with this Lewis structure?

Accepted Answer

A)  There are too many electrons.
B)  There are too few electrons.
C)  The O atom does not have an octet.
D)  The C atom does not have an octet.
E)  There is nothing wrong with this Lewis structure.F) B) and E)
G) A) and D)

Question 5

Which substance will exhibit hydrogen bonding between molecules?

Accepted Answer

A)  (CH3) 3N
B)  CH3-O-CH3
C)  CH3CH2-OH
D)  CH3CH2-F
E)  HIF) A) and B)
G) A) and C)

Question 6

According to the VSEPR model, a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

Accepted Answer

A)  linear
B)  bent
C)  trigonal planar
D)  tetrahedral
E)  seesawF) B) and E)
G) All of the above

Question 7

What is the molecular geometry of BeH2 as predicted by the VSEPR model?

Accepted Answer

A)  tetrahedral
B)  bent
C)  trigonal planar
D)  linear
E)  trigonal pyramidalF) All of the above
G) A) and D)

Question 8

What does the abbreviation VSEPR stand for?

Accepted Answer

A)  Very Specific Electron and Proton Repair
B)  Variable Selective of Electron and Protons
C)  Valence Shell for Every Proton
D)  Very Selective Electron Pair theory
E)  Valence-Shell Electron-Pair RepulsionF) B) and D)
G) B) and C)

Question 9

Using the VSEPR model, predict the molecular geometry around the central atom in PO43−.

Accepted Answer

A)  trigonal planar
B)  trigonal pyramidal
C)  tetrahedral
D)  trigonal bipyramidal
E)  octahedralF) C) and E)
G) A) and C)

Question 10

Select the correct Lewis structure for nitrogen trifluoride, NF3.

Accepted Answer

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G) All of the above

Question 11

What is the number of lone electron pairs on the central atom of a molecule having a trigonal pyramidal molecular geometry, such as NH3?

Accepted Answer

A)  1
B)  2
C)  3
D)  0
E)  4F) B) and E)
G) None of the above

Question 12

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF2−?

Accepted Answer

A)  1
B)  2
C)  3
D)  0
E)  4F) A) and B)
G) A) and C)

Question 13

What is the predicted O-C-O bond angle in CO2?

Accepted Answer

A)  60°
B)  90°
C)  109.5°
D)  120°
E)  180°F) B) and C)
G) A) and D)

Question 14

According to the VSEPR model, the predicted molecular geometry of the SO3 molecule is

Accepted Answer

A)  pyramidal.
B)  tetrahedral.
C)  trigonal planar.
D)  seesaw.
E)  square planar.F) A) and B)
G) A) and C)

Question 15

In which one of the following is the best Lewis structure a resonance structure?

Accepted Answer

A)  SO3
B)  BF3
C)  I3−
D)  SCO (C = central atom) 
E)  SO32−F) None of the above
G) D) and E)

Question 16

For which of the following pure substances are the intermolecular interactions entirely due to dispersion forces?

Accepted Answer

A)  C2H6
B)  CH3OCH3
C)  NO2
D)  H2S
E)  Ca(NO3) 2F) A) and B)
G) C) and D)

Question 17

The strongest intermolecular interactions between ethyl alcohol (CH3CH2OH)  molecules arise from

Accepted Answer

A)  dipole-dipole forces.
B)  London dispersion forces.
C)  hydrogen bonding.
D)  ion-dipole interactions.
E)  carbon-oxygen bonds.F) A) and B)
G) All of the above

Question 18

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

Accepted Answer

A)  trigonal pyramidal
B)  bent
C)  tetrahedral
D)  linear
E)  trigonal planarF) B) and E)
G) C) and E)

Question 19

The Lewis structure for CS2 is:

Accepted Answer

A)   2 is: 
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B)     
C)     
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F) A) and B)

Question 20

The strongest intermolecular interactions between hydrogen fluoride (HF)  molecules arise from

Accepted Answer

A)  dipole-dipole forces.
B)  London dispersion forces.
C)  hydrogen bonding.
D)  ion-dipole interactions.
E)  ionic bonds.F) D) and E)
G) B) and D)

Exam 6: Molecular Shape

Using the VSEPR model, predict the molecular geometry around the central atom in SO32−.

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What does the abbreviation VSEPR stand for?

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The strongest intermolecular interactions between hydrogen fluoride (HF) molecules arise from

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According to the VSEPR model, a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

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What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

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The strongest intermolecular interactions between ethyl alcohol (CH3CH2OH) molecules arise from

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Which one of the following molecules is polar?

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What is the molecular geometry of BeH2 as predicted by the VSEPR model?

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

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What is wrong with this Lewis structure?

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What is the number of lone electron pairs on the central atom of a molecule having a trigonal pyramidal molecular geometry, such as NH3?

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According to the VSEPR model, the predicted molecular geometry of the SO3 molecule is

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Select the correct Lewis structure for nitrogen trifluoride, NF3.

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Using the VSEPR model, predict the molecular geometry around the central atom in PO43−.

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The Lewis structure for CS2 is:

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What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF2−?

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In which one of the following is the best Lewis structure a resonance structure?

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For which of the following pure substances are the intermolecular interactions entirely due to dispersion forces?

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Which substance will exhibit hydrogen bonding between molecules?

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What is the predicted O-C-O bond angle in CO2?

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Using the VSEPR model, predict the molecular geometry around the central atom in SO₃²⁻.

Correct Answer
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According to the VSEPR model, a molecule with the general formula AB₂ with two lone pairs on the central atom will have a _____ molecular geometry.

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What is the predicted molecular geometry of the CH₄ molecule according to the VSEPR model?

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The strongest intermolecular interactions between ethyl alcohol (CH₃CH₂OH) molecules arise from

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What is the molecular geometry of BeH₂ as predicted by the VSEPR model?

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What is the number of lone electron pairs on the central atom of a molecule having a trigonal pyramidal molecular geometry, such as NH₃?

Correct Answer
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According to the VSEPR model, the predicted molecular geometry of the SO₃ molecule is

Correct Answer
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Select the correct Lewis structure for nitrogen trifluoride, NF₃.

Correct Answer
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Using the VSEPR model, predict the molecular geometry around the central atom in PO₄³⁻.

Correct Answer
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The Lewis structure for CS₂ is:

Correct Answer
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What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF₂⁻?

Correct Answer
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What is the predicted O-C-O bond angle in CO₂?

Correct Answer
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