Question 1

Which of the following is required for the determination of the VSEPR model and the molecular shape?

Accepted Answer

A)  Atomic mass 
B)  Number of protons 
C)  Oxidation number 
D)  Lewis structure 
E)  None of the answers is correct. 
A)  Atomic mass 
B)  Number of protons 
C)  Oxidation number 
D)  Lewis structure 
E)  None of the answers is correct.

Question 2

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry, such as NH3?

Accepted Answer

A)  5 
B)  2 
C)  3 
D)  4 
E)  6 
A)  5 
B)  2 
C)  3 
D)  4 
E)  6

Question 3

Which of the following molecules has a nonzero dipole moment?

Accepted Answer

A)  BeCl2 
B)  SF2 
C)  KrF2 
D)  CO2 
E)  CCl4 
A)  BeCl2 
B)  SF2 
C)  KrF2 
D)  CO2 
E)  CCl4

Question 4

Valence bond theory predicts that iodine will use ________ hybrid orbitals in ICl2-.

Accepted Answer

A)  sp2 
B)  sp3 
C)  sp3d 
D)  sp3d2 
E)  None of these choices is correct. 
A)  sp2 
B)  sp3 
C)  sp3d 
D)  sp3d2 
E)  None of these choices is correct.

Question 5

Which formula is incorrectly matched with its VSEPR model representation? (Note: Lone pairs on the models, if any, are not shown.)

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 6

Indicate the type of hybrid orbitals used by the central atom in CCl4.

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 7

When PCl5 solidifies it forms PCl4+cations and PCl6- anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl4+cation?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 8

The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp2 hybrid orbital.

Accepted Answer

A) True 
 B)False

Question 9

Which has a dipole moment of zero?

Accepted Answer

A)  N2O 
B)  NF3 
C)  H2S 
D)  SeO3 
E)  CH3Cl 
A)  N2O 
B)  NF3 
C)  H2S 
D)  SeO3 
E)  CH3Cl

Question 10

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 pyramidal 
A)  tetrahedral 
B)  bent 
C)  trigonal planar 
D)  linear 
E)  trigonal pyramidal

Question 11

Which is the most reasonable prediction for the Cl-N-Cl bond angle in NCl3?

Accepted Answer

A)  120° 
B)  111° 
C)  109.5° 
D)  107° 
E)  90° 
A)  120° 
B)  111° 
C)  109.5° 
D)  107° 
E)  90°

Question 12

Indicate the type of hybrid orbitals used by the central atom in PCl3.

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 13

What is the hybridization of the As atom in the AsF5 molecule?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 14

How many π bonds are there in CH3COCH3?

Accepted Answer

Question 15

What is the molecular geometry of ClF2- as predicted by the VSEPR model?

Accepted Answer

A)  linear 
B)  bent 
C)  seesaw 
D)  T-shaped 
E)  trigonal bipyramidal 
A)  linear 
B)  bent 
C)  seesaw 
D)  T-shaped 
E)  trigonal bipyramidal

Question 16

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)  octahedral 
A)  trigonal planar 
B)  trigonal pyramidal 
C)  tetrahedral 
D)  trigonal bipyramidal 
E)  octahedral

Question 17

Rank the following molecules in order of increasing dipole moment.

Accepted Answer

A)  III < II < I 
B)  III < I < II 
C)  I < II < III 
D)  I < III < II 
E)  II < III < I 
A)  III < II < I 
B)  III < I < II 
C)  I < II < III 
D)  I < III < II 
E)  II < III < I

Question 18

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

Question 19

In which molecule is the central atom sp2 hybridized?

Accepted Answer

A)  SO2 
B)  N2O 
C)  BeCl2 
D)  NF3 
E)  PF5 
A)  SO2 
B)  N2O 
C)  BeCl2 
D)  NF3 
E)  PF5

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

Which of the following is required for the determination of the VSEPR model and the molecular shape?

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry, such as NH3?

Which of the following molecules has a nonzero dipole moment?

Valence bond theory predicts that iodine will use ________ hybrid orbitals in ICl2-.

Which formula is incorrectly matched with its VSEPR model representation? (Note: Lone pairs on the models, if any, are not shown.)

Indicate the type of hybrid orbitals used by the central atom in CCl4.

When PCl5 solidifies it forms PCl4+cations and PCl6- anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl4+cation?

The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp2 hybrid orbital.

Which has a dipole moment of zero?

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

Which is the most reasonable prediction for the Cl-N-Cl bond angle in NCl3?

Indicate the type of hybrid orbitals used by the central atom in PCl3.

What is the hybridization of the As atom in the AsF5 molecule?

How many π bonds are there in CH3COCH3?

What is the molecular geometry of ClF2- as predicted by the VSEPR model?

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

Rank the following molecules in order of increasing dipole moment.

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

In which molecule is the central atom sp2 hybridized?

Chemistry: the Central Science

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Quantum Theory and the Electronic Structure of Atoms

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Chemical Bonding I: Basic Concepts

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Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

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Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

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Nonmetallic Elements and Their Compounds

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Filters

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry, such as NH₃?

Valence bond theory predicts that iodine will use ________ hybrid orbitals in ICl₂^-.

Indicate the type of hybrid orbitals used by the central atom in CCl₄.

When PCl₅ solidifies it forms PCl₄⁺cations and PCl₆^-anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl₄⁺cation?

The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp² hybrid orbital.

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

Which is the most reasonable prediction for the Cl-N-Cl bond angle in NCl₃?

Indicate the type of hybrid orbitals used by the central atom in PCl₃.

What is the hybridization of the As atom in the AsF₅ molecule?

How many π bonds are there in CH₃COCH₃?

What is the molecular geometry of ClF₂^- as predicted by the VSEPR model?

Using the VSEPR model, predict the molecular geometry around the central atom in PO₄^3-.

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

In which molecule is the central atom sp² hybridized?