Question 1

Use the VSEPR model to predict the geometry for two, three, four, five, and six electron pair domains, respectively.

Accepted Answer

A)  linear, triangular pyramidal, tetrahedral, triangular bipyramidal, octahedral 
B)  linear, triangular planar, tetrahedral, square pyramidal, octahedral 
C)  bent, triangular pyramidal, tetrahedral, triangular pyramidal, octahedral 
D)  linear, triangular planar, tetrahedral, T-shaped, hexagonal 
E)  linear, triangular planar, tetrahedral, triangular bipyramidal, octahedral 
A)  linear, triangular pyramidal, tetrahedral, triangular bipyramidal, octahedral 
B)  linear, triangular planar, tetrahedral, square pyramidal, octahedral 
C)  bent, triangular pyramidal, tetrahedral, triangular pyramidal, octahedral 
D)  linear, triangular planar, tetrahedral, T-shaped, hexagonal 
E)  linear, triangular planar, tetrahedral, triangular bipyramidal, octahedral

Question 2

For which molecule will the electron-pair geometry be the same as the molecular geometry?

Accepted Answer

A)  NO2- 
B)  SeH2 
C)  NF3 
D)  ClF3 
E)  ICl6+ 
A)  NO2- 
B)  SeH2 
C)  NF3 
D)  ClF3 
E)  ICl6+

Question 3

Which statement is false? A molecule may be polar if

Accepted Answer

A)  it has polar bonds 
B)  it has does not have nonpolar bonds 
C)  it is not symmetrical 
D)  it has a permanent dipole 
E)  it has all nonpolar bonds 
A)  it has polar bonds 
B)  it has does not have nonpolar bonds 
C)  it is not symmetrical 
D)  it has a permanent dipole 
E)  it has all nonpolar bonds

Question 4

Which of the following central atoms would be expected to accommodate more than four electron pairs in some of its compounds?

Accepted Answer

A)  fluorine 
B)  boron 
C)  krypton 
D)  carbon 
E)  helium 
A)  fluorine 
B)  boron 
C)  krypton 
D)  carbon 
E)  helium

Question 5

Determine the hybridization around each central atom.

Accepted Answer

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

Question 6

How many lone pairs of electrons does the Lewis dot structure of H2S have around its central atom and what is the shape of the molecule?

Accepted Answer

A)  0, linear 
B)  0, bent 
C)  1, triangular planar 
D)  2, tetrahedral 
E)  2, bent 
A)  0, linear 
B)  0, bent 
C)  1, triangular planar 
D)  2, tetrahedral 
E)  2, bent

Question 7

When sketching a molecule, an atom connected by a dashed line means that

Accepted Answer

A)  the atom has a negative formal charge. 
B)  the atom has a negative ionic charge. 
C)  the atom lies behind the plane of the paper. 
D)  the bond is longer than indicated by the drawing. 
E)  some atoms have been left out for clarity. 
A)  the atom has a negative formal charge. 
B)  the atom has a negative ionic charge. 
C)  the atom lies behind the plane of the paper. 
D)  the bond is longer than indicated by the drawing. 
E)  some atoms have been left out for clarity.

Question 8

Use the VSEPR model to predict the molecular geometry of XeF2.

Accepted Answer

A)  linear 
B)  bent 
C)  tetrahedral 
D)  triangular bipyramidal 
E)  T-shaped 
A)  linear 
B)  bent 
C)  tetrahedral 
D)  triangular bipyramidal 
E)  T-shaped

Question 9

Which compound does not have tetrahedral electron-pair geometry?

Accepted Answer

A)  CCl4 
B)  NO2- 
C)  H3O+ 
D)  PCl3 
E)  H2O 
A)  CCl4 
B)  NO2- 
C)  H3O+ 
D)  PCl3 
E)  H2O

Question 10

Use the VSEPR model to predict the electron-pair geometry, the molecular geometry, and the H-N-H bond angle for NH3.

Accepted Answer

A)  square planar, square planar, 90$\circ$ 
B)  tetrahedral, triangular pyramidal 109.5$\circ$ 
C)  tetrahedral, square planar, 109.5$\circ$ 
D)  triangular bipyramidal, tetrahedral 90$\circ$ 
E)  tetrahedral, tetrahedral, 109.5$\circ$ 
A)  square planar, square planar, 90$\circ$ 
B)  tetrahedral, triangular pyramidal 109.5$\circ$ 
C)  tetrahedral, square planar, 109.5$\circ$ 
D)  triangular bipyramidal, tetrahedral 90$\circ$ 
E)  tetrahedral, tetrahedral, 109.5$\circ$

Question 11

Which interaction(s) exist(s) between CO molecules?

Accepted Answer

A)  I only 
B)  II only 
C)  IV only 
D)  I and II 
E)  I and IV 
A)  I only 
B)  II only 
C)  IV only 
D)  I and II 
E)  I and IV

Question 12

Use the VSEPR model to predict the correct molecular shapes for ICl3 and NO2-.

Accepted Answer

A)  triangular planar, linear 
B)  triangular pyramidal, triangular planar 
C)  see-saw, linear 
D)  T-shaped, bent 
E)  triangular bipyramidal, triangular planar 
A)  triangular planar, linear 
B)  triangular pyramidal, triangular planar 
C)  see-saw, linear 
D)  T-shaped, bent 
E)  triangular bipyramidal, triangular planar

Question 13

Because of London forces, molecules with ____ molecular weights tend to have ____ melting points.

Accepted Answer

A)  lower; higher 
B)  higher; lower 
C)  higher; higher 
D)  even; higher 
E)  odd; higher 
A)  lower; higher 
B)  higher; lower 
C)  higher; higher 
D)  even; higher 
E)  odd; higher

Question 14

Determine the hybridization around each central atom.

Accepted Answer

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

Question 15

Characterize the polarity of these molecules, in the order written.

Accepted Answer

A)  nonpolar, nonpolar, nonpolar 
B)  nonpolar, nonpolar, polar 
C)  polar, nonpolar, polar 
D)  polar, polar, nonpolar 
E)  polar, polar, polar 
A)  nonpolar, nonpolar, nonpolar 
B)  nonpolar, nonpolar, polar 
C)  polar, nonpolar, polar 
D)  polar, polar, nonpolar 
E)  polar, polar, polar

Question 16

According to the VSEPR model

Accepted Answer

A)  The size of the electrons in the valence shell of a molecule determines the shape of the molecule. 
B)  The velocity of the electrons in the valence shell of a molecule determines the shape of the molecule. 
C)  The repulsion of electrons in the valence shell of a molecule determines the shape of the molecule. 
D)  The attraction of electrons in the valence shell of a molecule determines the shape of the molecule. 
E)  The mass of the electrons in the valence shell of a molecule determines the shape of the molecule. 
A)  The size of the electrons in the valence shell of a molecule determines the shape of the molecule. 
B)  The velocity of the electrons in the valence shell of a molecule determines the shape of the molecule. 
C)  The repulsion of electrons in the valence shell of a molecule determines the shape of the molecule. 
D)  The attraction of electrons in the valence shell of a molecule determines the shape of the molecule. 
E)  The mass of the electrons in the valence shell of a molecule determines the shape of the molecule.

Question 17

The carbon-carbon p bond in ethylene, CH2CH2, results from the overlap of which of the following?

Accepted Answer

A)  s atomic orbitals 
B)  p atomic orbitals 
C)  sp hybrid orbitals 
D)  sp2 hybrid orbitals 
E)  sp3 hybrid orbitals 
A)  s atomic orbitals 
B)  p atomic orbitals 
C)  sp hybrid orbitals 
D)  sp2 hybrid orbitals 
E)  sp3 hybrid orbitals

Question 18

Which substance experiences dipole-dipole interactions between its molecules?

Accepted Answer

A)  N2 
B)  ClF3 
C)  SiH4 
D)  CO2 
E)  PCl5 
A)  N2 
B)  ClF3 
C)  SiH4 
D)  CO2 
E)  PCl5

Question 19

Which description of a sigma bond is false?

Accepted Answer

A)  head-to-head orbital overlap 
B)  electron density always lies along the bonding axis 
C)  orbital overlap is always between hybridized orbitals 
D)  valence electrons are involved 
E)  orbital overlap is always along the interatomic axis 
A)  head-to-head orbital overlap 
B)  electron density always lies along the bonding axis 
C)  orbital overlap is always between hybridized orbitals 
D)  valence electrons are involved 
E)  orbital overlap is always along the interatomic axis

Question 20

How many atoms are bonded to the central atom when the molecular geometry is T-shaped?

Accepted Answer

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

Use the VSEPR model to predict the geometry for two, three, four, five, and six electron pair domains, respectively.

For which molecule will the electron-pair geometry be the same as the molecular geometry?

Which statement is false? A molecule may be polar if

Which of the following central atoms would be expected to accommodate more than four electron pairs in some of its compounds?

Determine the hybridization around each central atom.

How many lone pairs of electrons does the Lewis dot structure of H₂S have around its central atom and what is the shape of the molecule?

When sketching a molecule, an atom connected by a dashed line means that

Use the VSEPR model to predict the molecular geometry of XeF₂.

Which compound does not have tetrahedral electron-pair geometry?

Use the VSEPR model to predict the electron-pair geometry, the molecular geometry, and the H-N-H bond angle for NH₃.

Which interaction(s) exist(s) between CO molecules?

Use the VSEPR model to predict the correct molecular shapes for ICl₃ and NO₂^-.

Because of London forces, molecules with molecular weights tend to have melting points.

Determine the hybridization around each central atom.

Characterize the polarity of these molecules, in the order written.

According to the VSEPR model

The carbon-carbon p bond in ethylene, CH₂CH₂, results from the overlap of which of the following?

Which substance experiences dipole-dipole interactions between its molecules?

Which description of a sigma bond is false?

How many atoms are bonded to the central atom when the molecular geometry is T-shaped?

The Nature of Chemistry

Atoms and Elements

Chemical Compounds

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Covalent Bonding

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

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Exam 9: Molecular Structure

Use the VSEPR model to predict the geometry for two, three, four, five, and six electron pair domains, respectively.

For which molecule will the electron-pair geometry be the same as the molecular geometry?

Which statement is false? A molecule may be polar if

Which of the following central atoms would be expected to accommodate more than four electron pairs in some of its compounds?

Determine the hybridization around each central atom.

How many lone pairs of electrons does the Lewis dot structure of H2S have around its central atom and what is the shape of the molecule?

When sketching a molecule, an atom connected by a dashed line means that

Use the VSEPR model to predict the molecular geometry of XeF2.

Which compound does not have tetrahedral electron-pair geometry?

Use the VSEPR model to predict the electron-pair geometry, the molecular geometry, and the H-N-H bond angle for NH3.

Which interaction(s) exist(s) between CO molecules?

Use the VSEPR model to predict the correct molecular shapes for ICl3 and NO2-.

Because of London forces, molecules with ____ molecular weights tend to have ____ melting points.

Determine the hybridization around each central atom.

Characterize the polarity of these molecules, in the order written.

According to the VSEPR model

The carbon-carbon p bond in ethylene, CH2CH2, results from the overlap of which of the following?

Which substance experiences dipole-dipole interactions between its molecules?

Which description of a sigma bond is false?

How many atoms are bonded to the central atom when the molecular geometry is T-shaped?

The Nature of Chemistry

Atoms and Elements

Chemical Compounds

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Covalent Bonding

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

Filters

How many lone pairs of electrons does the Lewis dot structure of H₂S have around its central atom and what is the shape of the molecule?

Use the VSEPR model to predict the molecular geometry of XeF₂.

Use the VSEPR model to predict the electron-pair geometry, the molecular geometry, and the H-N-H bond angle for NH₃.

Use the VSEPR model to predict the correct molecular shapes for ICl₃ and NO₂^-.

Because of London forces, molecules with molecular weights tend to have melting points.

The carbon-carbon p bond in ethylene, CH₂CH₂, results from the overlap of which of the following?