Question 1

What is the molecular shape of N2O as predicted by the VSEPR theory?

Accepted Answer

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

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

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 4

How many resonance structures are possible for NO3-?

Accepted Answer

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

Question 5

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

Accepted Answer

A)  90° 
B)  109° 
C)  120° 
D)  180° 
E)  between 110 and 120° 
A)  90° 
B)  109° 
C)  120° 
D)  180° 
E)  between 110 and 120°

Question 6

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

Accepted Answer

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

Question 7

Select the correct Lewis structure for nitrogen trifluoride, NF3.

Accepted Answer

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

Question 8

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°

Question 9

Boron never achieves an octet in any of its compounds.

Accepted Answer

A) True 
 B)False

Question 10

Explain what is meant by "dipole moment", and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

Accepted Answer

A dipole moment arises in a molecule whe

Question 11

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 12

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI3 which minimizes formal charges.

Accepted Answer

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

Question 13

What is the molecular shape of SiF62- as predicted by the VSEPR theory?

Accepted Answer

A)  trigonal bipyramidal 
B)  hexagonal 
C)  tetrahedral 
D)  see-saw 
E)  octahedral 
A)  trigonal bipyramidal 
B)  hexagonal 
C)  tetrahedral 
D)  see-saw 
E)  octahedral

Question 14

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 15

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 16

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 17

In the nitrate ion (NO3-), nitrogen and oxygen are held together by

Accepted Answer

A)  ionic interactions. 
B)  covalent bonds. 
C)  dative bonds. 
D)  electronegativity. 
E)  network bonds. 
A)  ionic interactions. 
B)  covalent bonds. 
C)  dative bonds. 
D)  electronegativity. 
E)  network bonds.

Question 18

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 19

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 the above is correct. 
A)    
B)    
C)    
D)    
E)  None of the above is correct.

Question 20

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

Exam 10: The Shapes of Molecules

What is the molecular shape of N2O as predicted by the VSEPR theory?

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

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

How many resonance structures are possible for NO3-?

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 AX5E will have a ______ molecular shape.

Select the correct Lewis structure for nitrogen trifluoride, NF3.

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

Boron never achieves an octet in any of its compounds.

Explain what is meant by "dipole moment", and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

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

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI3 which minimizes formal charges.

What is the molecular shape of SiF62- as predicted by the VSEPR theory?

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

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

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

In the nitrate ion (NO3-), nitrogen and oxygen are held together by

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

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

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

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The 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: Bonding, Structure, and Reactivity

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

What is the molecular shape of N₂O as predicted by the VSEPR theory?

How many resonance structures are possible for NO₃^-?

Predict the ideal bond angles in AsCl₃using the molecular shape given by the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX₅E will have a ______ molecular shape.

Select the correct Lewis structure for nitrogen trifluoride, NF₃.

Predict the actual bond angle in SeCl₂using the VSEPR theory.

According to VSEPR theory, a molecule with the general formula AX₂E₃will have a _____ molecular shape.

Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI₃ which minimizes formal charges.

What is the molecular shape of SiF₆^2-as predicted by the VSEPR theory?

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

In the nitrate ion (NO₃^-), nitrogen and oxygen are held together by

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

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

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