Question 1

Predict the actual bond angle in SeCl2 using the VSEPR theory.

Accepted Answer

A)  more than 120° 
B)  between 109° and 120° 
C)  between 90° and 109° 
D)  exactly 90° 
E)  less than 90° 
A)  more than 120° 
B)  between 109° and 120° 
C)  between 90° and 109° 
D)  exactly 90° 
E)  less than 90° C

Question 2

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl2.

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these choices are correct. 
A)    
B)    
C)    
D)    
E)  None of these choices are correct. B

Question 3

Hydrazine, N2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these choices are correct. 
A)    
B)    
C)    
D)    
E)  None of these choices are correct. C

Question 4

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

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

Question 5

Which one of the following molecules does not have a dipole moment?

Accepted Answer

A)  CS2 
B)  H2S 
C)  CH2Cl2 
D)  PH3 
E)  CH2O 
A)  CS2 
B)  H2S 
C)  CH2Cl2 
D)  PH3 
E)  CH2O

Question 6

Which of the following has no net dipole moment?

Accepted Answer

A)  N2O 
B)  NF3 
C)  H2Se 
D)  TeO3 
E)  CH3Cl 
A)  N2O 
B)  NF3 
C)  H2Se 
D)  TeO3 
E)  CH3Cl

Question 7

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

Accepted Answer

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

Question 8

What is the molecular shape of HOF as predicted by the VSEPR theory?

Accepted Answer

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

Question 9

What is the molecular shape of ClO3F as predicted by the VSEPR theory?

Accepted Answer

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

Question 10

In order for a noncyclic triatomic molecule to be bent, VSEPR theory requires that there must be two lone pairs on the central atom.

Accepted Answer

A) True 
 B)False

Question 11

A molecule that contains polar bonds will always have a dipole moment.

Accepted Answer

A) True 
 B)False

Question 12

What is the molecular shape of BCl3 as predicted by the VSEPR theory?

Accepted Answer

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

Question 13

Boron never achieves an octet in any of its compounds.

Accepted Answer

A) True 
 B)False

Question 14

Predict the ideal bond angles around carbon in C2I2 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90° 
B)  109° 
C)  120° 
D)  180° 
E)  None of these choices are correct. 
A)  90° 
B)  109° 
C)  120° 
D)  180° 
E)  None of these choices are correct.

Question 15

In which one of the following structures does the central atom have a formal charge of +2?

Accepted Answer

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

Question 16

According to VSEPR theory, a molecule with the general formula AX4 will have a ______ molecular shape.

Accepted Answer

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

Question 17

Which of the following atoms can expand its valence shell when bonding?

Accepted Answer

A)  N 
B)  C 
C)  O 
D)  P 
E)  Al 
A)  N 
B)  C 
C)  O 
D)  P 
E)  Al

Question 18

According to VSEPR theory, a molecule with the general formula AX3E2 will have a _____ molecular shape.

Accepted Answer

A)  trigonal pyramidal 
B)  trigonal bipyramidal 
C)  trigonal planar 
D)  T-shaped 
E)  see-saw 
A)  trigonal pyramidal 
B)  trigonal bipyramidal 
C)  trigonal planar 
D)  T-shaped 
E)  see-saw

Question 19

What is the molecular shape of NO2- as predicted by the VSEPR theory?

Accepted Answer

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

Question 20

Which of the following elements would you expect most likely to be a central atom with an expanded valence shell?

Accepted Answer

A)  Ne 
B)  P 
C)  N 
D)  C 
E)  B 
A)  Ne 
B)  P 
C)  N 
D)  C 
E)  B

Exam 10: The Shapes of Molecules

Predict the actual bond angle in SeCl2 using the VSEPR theory.

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl2.

Hydrazine, N2H4, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Which one of the following Lewis structures is definitely incorrect?

Which one of the following molecules does not have a dipole moment?

Which of the following has no net dipole moment?

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

What is the molecular shape of HOF as predicted by the VSEPR theory?

What is the molecular shape of ClO3F as predicted by the VSEPR theory?

In order for a noncyclic triatomic molecule to be bent, VSEPR theory requires that there must be two lone pairs on the central atom.

A molecule that contains polar bonds will always have a dipole moment.

What is the molecular shape of BCl3 as predicted by the VSEPR theory?

Boron never achieves an octet in any of its compounds.

Predict the ideal bond angles around carbon in C2I2 using the molecular shape given by the VSEPR theory.

In which one of the following structures does the central atom have a formal charge of +2?

According to VSEPR theory, a molecule with the general formula AX4 will have a ______ molecular shape.

Which of the following atoms can expand its valence shell when bonding?

According to VSEPR theory, a molecule with the general formula AX3E2 will have a _____ molecular shape.

What is the molecular shape of NO2- as predicted by the VSEPR theory?

Which of the following elements would you expect most likely to be a central atom with an expanded valence shell?

Keys to Studying Chemistry Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

Theories of Covalent Bonding

Intermolecular Forces Liquids, Solids, and Phase Changes

The Properties of Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Equilibrium the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Predict the actual bond angle in SeCl₂ using the VSEPR theory.

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl₂.

Hydrazine, N₂H₄, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO₄^-.

What is the molecular shape of ClO₃F as predicted by the VSEPR theory?

What is the molecular shape of BCl₃ as predicted by the VSEPR theory?

Predict the ideal bond angles around carbon in C₂I₂ using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX₄ will have a ______ molecular shape.

According to VSEPR theory, a molecule with the general formula AX₃E₂ will have a _____ molecular shape.

What is the molecular shape of NO₂^- as predicted by the VSEPR theory?