Question 1

According to VSEPR theory, a molecule with the general formula AX3E will have a _____ molecular shape.

Accepted Answer

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

Question 2

The Lewis structure of formaldehyde, CH2O, is shown. Use VSEPR theory 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 3

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 4

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

Accepted Answer

A)  SF6   
B)  SO42¯   
C)  O3   
D)  BeCl2   
E)  AlCl4¯   
A)  SF6   
B)  SO42¯   
C)  O3   
D)  BeCl2   
E)  AlCl4¯

Question 5

What is the molecular shape of BeH2 as predicted by the VSEPR theory?

Accepted Answer

A)  linear 
B)  bent 
C)  angular 
D)  trigonal 
E)  None of these choices is correct. 
A)  linear 
B)  bent 
C)  angular 
D)  trigonal 
E)  None of these choices is correct.

Question 6

For the chlorate ion, ClO3¯, draw two different valid Lewis structures, as follows:
A) a structure in which the octet rule is obeyed.
B) a structure in which formal charges are minimized.

Accepted Answer

Question 7

Select the best Lewis structure for ClCN.

Accepted Answer

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

Question 8

List the three important ways in which molecules can violate the octet rule, and in each case draw one Lewis structure of your choice as an example.

Accepted Answer

Electron-deficient molecules have fewer

Question 9

Predict the ideal bond angles in IF2¯ using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  60 $\degree$ 
B)  90 $\degree$ 
C)  109 $\degree$ 
D)  120 $\degree$ 
E)  180 $\degree$ 
A)  60 $\degree$ 
B)  90 $\degree$ 
C)  109 $\degree$ 
D)  120 $\degree$ 
E)  180 $\degree$

Question 10

What is the molecular shape of ClF2¯ as predicted by the VSEPR theory?

Accepted Answer

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

Question 11

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  between 110 and 120 $\degree$ 
A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  between 110 and 120 $\degree$

Question 12

According to VSEPR theory, a molecule with the general formula AX2E2 will have a _____ molecular shape.

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  see-saw 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  see-saw

Question 13

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

Accepted Answer

A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  None of these choices is correct. 
A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  None of these choices is correct.

Question 14

Which one of the following molecules and ions will have a planar geometry?

Accepted Answer

A)  PCl3 
B)  BF4¯ 
C)  XeF4 
D)  BrF5 
E)  H3O+ 
A)  PCl3 
B)  BF4¯ 
C)  XeF4 
D)  BrF5 
E)  H3O+

Question 15

In which one of the following molecules are all the bonds single?

Accepted Answer

A)  O3 
B)  POCl3 
C)  CO 
D)  COCl2 
E)  N2H4 
A)  O3 
B)  POCl3 
C)  CO 
D)  COCl2 
E)  N2H4

Question 16

Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  < 90 $\degree$ 
A)  90 $\degree$ 
B)  109 $\degree$ 
C)  120 $\degree$ 
D)  180 $\degree$ 
E)  < 90 $\degree$

Question 17

According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

Accepted Answer

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

Question 18

According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

Accepted Answer

A)  tetrahedral 
B)  square pyramidal 
C)  square planar 
D)  octahedral 
E)  see-saw 
A)  tetrahedral 
B)  square pyramidal 
C)  square planar 
D)  octahedral 
E)  see-saw

Question 19

Select the correct Lewis structure for NOCl, a reactive material used as an ionizing solvent.

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 20

In the following Lewis structure for ClO3F, chlorine has a formal charge of ____ and an oxidation number of ____.

Accepted Answer

A)  7, 7 
B)  7, -1 
C)  1, 1 
D)  1, -1 
E)  1, 7 
A)  7, 7 
B)  7, -1 
C)  1, 1 
D)  1, -1 
E)  1, 7

Exam 10: The Shapes of Molecules

According to VSEPR theory, a molecule with the general formula AX3E will have a _____ molecular shape.

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

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

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

What is the molecular shape of BeH2 as predicted by the VSEPR theory?

For the chlorate ion, ClO3¯, draw two different valid Lewis structures, as follows: A) a structure in which the octet rule is obeyed. B) a structure in which formal charges are minimized.

Select the best Lewis structure for ClCN.

List the three important ways in which molecules can violate the octet rule, and in each case draw one Lewis structure of your choice as an example.

Predict the ideal bond angles in IF2¯ using the molecular shape given by the VSEPR theory.

What is the molecular shape of ClF2¯ as predicted by the VSEPR theory?

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX2E2 will have a _____ molecular shape.

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

Which one of the following molecules and ions will have a planar geometry?

In which one of the following molecules are all the bonds single?

Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

Select the correct Lewis structure for NOCl, a reactive material used as an ionizing solvent.

In the following Lewis structure for ClO3F, chlorine has a formal charge of ____ and an oxidation number of ____.

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 AX₃E will have a _____ molecular shape.

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

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

What is the molecular shape of BeH₂ as predicted by the VSEPR theory?

For the chlorate ion, ClO₃^¯, draw two different valid Lewis structures, as follows: A) a structure in which the octet rule is obeyed. B) a structure in which formal charges are minimized.

Predict the ideal bond angles in IF₂^¯ using the molecular shape given by the VSEPR theory.

What is the molecular shape of ClF₂^¯ as predicted by the VSEPR theory?

Predict the ideal bond angles in AsCl₃ using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX₂E₂ will have a _____ molecular shape.

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

Predict the ideal bond angles in GeCl₄ using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX₂E will have a ______ molecular shape.

According to VSEPR theory, a molecule with the general formula AX₄E₂ will have a _____ molecular shape.

In the following Lewis structure for ClO₃F, chlorine has a formal charge of and an oxidation number of .