Question 1

Which of the following molecules has a net 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 2

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 3

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

Accepted Answer

A)  bent 
B)  linear 
C)  trigonal planar 
D)  T-shaped 
E)  trigonal pyramidal 
A)  bent 
B)  linear 
C)  trigonal planar 
D)  T-shaped 
E)  trigonal pyramidal

Question 4

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 5

How many electron pairs are shared between the carbon atoms in C2H4?

Accepted Answer

A)  5 
B)  4 
C)  3 
D)  2 
E)  1 
A)  5 
B)  4 
C)  3 
D)  2 
E)  1

Question 6

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

Accepted Answer

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

Question 7

In which one of the following species is the central atom (the first atom in the formula) likely to violate the octet rule?

Accepted Answer

A)  BF4¯ 
B)  XeO3 
C)  SiCl4 
D)  NH3 
E)  CH2Cl2 
A)  BF4¯ 
B)  XeO3 
C)  SiCl4 
D)  NH3 
E)  CH2Cl2

Question 8

Draw the Lewis structure of XeF4. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

Accepted Answer

The Lewis structure is shown below. The

Question 9

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Accepted Answer

A)  PCl3 
B)  BF3 
C)  SO3 
D)  BrF3 
E)  CO32¯ 
A)  PCl3 
B)  BF3 
C)  SO3 
D)  BrF3 
E)  CO32¯

Question 10

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

Accepted Answer

A)  NH3 
B)  CO2 
C)  SF6 
D)  O2 
E)  CO32¯ 
A)  NH3 
B)  CO2 
C)  SF6 
D)  O2 
E)  CO32¯

Question 11

According to VSEPR theory, a molecule with the general formula AX6 will have a ______ molecular shape.

Accepted Answer

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

Question 12

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 13

Which one of the following molecules has a zero dipole moment?

Accepted Answer

A)  SO2 
B)  HCl 
C)  CS2 
D)  CO 
E)  Cl2O 
A)  SO2 
B)  HCl 
C)  CS2 
D)  CO 
E)  Cl2O

Question 14

Oxygen difluoride is a powerful oxidizing and fluorinating agent. Select its Lewis structure.

Accepted Answer

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

Question 15

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Accepted Answer

A)  linear 
B)  bent 
C)  see-saw 
D)  T-shaped 
E)  trigonal pyramidal 
A)  linear 
B)  bent 
C)  see-saw 
D)  T-shaped 
E)  trigonal pyramidal

Question 16

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2¯, carbon is the central atom) to illustrate.

Accepted Answer

The concept is resonance. In this situat

Question 17

According to VSEPR theory, a molecule with the general formula AX5 will have a ______ molecular shape.

Accepted Answer

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

Question 18

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)  NO2   
B)  BeCl2   
C)  CO32¯   
D)  CH4   
E)  SO2   
A)  NO2   
B)  BeCl2   
C)  CO32¯   
D)  CH4   
E)  SO2

Question 19

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 20

Draw all important resonance structures of the nitrate ion, NO3¯. .

Accepted Answer

Exam 10: The Shapes of Molecules

Which of the following molecules has a net dipole moment?

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

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

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

How many electron pairs are shared between the carbon atoms in C2H4?

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

In which one of the following species is the central atom (the first atom in the formula) likely to violate the octet rule?

Draw the Lewis structure of XeF4. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

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

According to VSEPR theory, a molecule with the general formula AX6 will have a ______ molecular shape.

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

Which one of the following molecules has a zero dipole moment?

Oxygen difluoride is a powerful oxidizing and fluorinating agent. Select its Lewis structure.

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2¯, carbon is the central atom) to illustrate.

According to VSEPR theory, a molecule with the general formula AX5 will have a ______ molecular shape.

Which one of the following Lewis structures is definitely incorrect?

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Draw all important resonance structures of the nitrate ion, NO3¯. .

Keys to the Study of Chemistry

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

According to VSEPR theory, a molecule with the general formula AX₂E₃ will have a _____ molecular shape.

How many electron pairs are shared between the carbon atoms in C₂H₄?

According to VSEPR theory, a molecule with the general formula AX₂ will have a ___ molecular shape.

Draw the Lewis structure of XeF₄. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

According to VSEPR theory, a molecule with the general formula AX₆ will have a ______ molecular shape.

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

What is the molecular shape of SCl₃F as predicted by the VSEPR theory?

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO₂^¯, carbon is the central atom) to illustrate.

According to VSEPR theory, a molecule with the general formula AX₅ will have a ______ molecular shape.

According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Draw all important resonance structures of the nitrate ion, NO₃^¯. .