Question 1

Which of the following shows the orientation of the net dipole for OCS?

Accepted Answer

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

Question 2

Arrange the interactions between pairs of electrons in order of increasing strength.

Accepted Answer

A)  bonding pair-bonding pair < lone pair-bonding pair < lone pair-lone pair 
B)  bonding pair-bonding pair < lone pair-lone pair < lone pair-bonding pair 
C)  lone pair-lone pair < lone pair-bonding pair < bonding pair-bonding pair 
D)  lone pair-lone pair < bonding pair-bonding pair < lone pair-bonding pair 
E)  lone pair-bonding pair < bonding pair-bonding pair < lone pair-lone pair 
A)  bonding pair-bonding pair < lone pair-bonding pair < lone pair-lone pair 
B)  bonding pair-bonding pair < lone pair-lone pair < lone pair-bonding pair 
C)  lone pair-lone pair < lone pair-bonding pair < bonding pair-bonding pair 
D)  lone pair-lone pair < bonding pair-bonding pair < lone pair-bonding pair 
E)  lone pair-bonding pair < bonding pair-bonding pair < lone pair-lone pair

Question 3

What is the geometry of the triiodide ion (I3-)?

Accepted Answer

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

Question 4

In 1995 a Japanese cult attacked the Tokyo subway system with the nerve gas Sarin, which focused world attention on the dangers of chemical warfare agents. The connectivity of atoms in the Sarin molecule is shown below. Complete the Lewis structure by adding bonds and lone pairs as necessary. Assign formal charges to the P and O atoms, and determine the local molecular geometry around the central oxygen atom.

Accepted Answer

@#IMG-DLM& The formal charges are all 0.

Question 5

Which of the following statements about bonds between two carbon atoms is/are correct? (I) Bond strength increases as more electrons are shared between the atoms.
(II) Bond strength increases as the overlap between atomic orbitals increases.
(III) Hybrid orbitals are used to describe (account for) the geometry (bond angles) around each carbon atom.

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  Only two of these are correct statements. 
E)  All three are correct statements. 
A)  I 
B)  II 
C)  III 
D)  Only two of these are correct statements. 
E)  All three are correct statements.

Question 6

Which of the following has a central atom with the same hybridization as the carbon in formaldehyde (H2CO)?

Accepted Answer

A)  SO2 
B)  OCS 
C)  ICl3 
D)  I3- 
E)  C2H2 
A)  SO2 
B)  OCS 
C)  ICl3 
D)  I3- 
E)  C2H2

Question 7

Which one of the following molecules has a bond order of 3?

Accepted Answer

A)  Li2 
B)  Be2 
C)  N2 
D)  F2 
E)  C2 
A)  Li2 
B)  Be2 
C)  N2 
D)  F2 
E)  C2

Question 8

What is the molecular geometry of SF4O?

Accepted Answer

A)  pentagonal 
B)  tetrahedral 
C)  trigonal bipyramidal 
D)  trigonal planar 
E)  square pyramidal 
A)  pentagonal 
B)  tetrahedral 
C)  trigonal bipyramidal 
D)  trigonal planar 
E)  square pyramidal

Question 9

Using the energy level diagram below, determine the bond order of the PO molecule?

Accepted Answer

A)  2 
B)  2.5 
C)  1.5 
D)  1 
E)  0.5 
A)  2 
B)  2.5 
C)  1.5 
D)  1 
E)  0.5

Question 10

A Lewis structure of aspirin without the nonbonding electrons is shown in the figure below. Identify the hybridization of the C1 and C2 atomic orbitals. Arrange the bonds (B2-B5) in order of increasing length.

Accepted Answer

C1 and C2 are sp² hybridized. B

Question 11

Which statement regarding a pi bond between two carbon atoms is correct?

Accepted Answer

A)  Regions of high electron density lie above and below the bond axis connecting the nuclei of the two atoms. 
B)  Can be described by the overlap of sp hybrid orbitals from each atom. 
C)  Can be described by the overlap of sp2 hybrid orbitals from each atom. 
D)  Can be described by the overlap of sp3 atomic orbitals from each atom. 
E)  Can be described by the overlap of a p atomic orbital from one atom with an sp2 hybrid orbital from the other atom. 
A)  Regions of high electron density lie above and below the bond axis connecting the nuclei of the two atoms. 
B)  Can be described by the overlap of sp hybrid orbitals from each atom. 
C)  Can be described by the overlap of sp2 hybrid orbitals from each atom. 
D)  Can be described by the overlap of sp3 atomic orbitals from each atom. 
E)  Can be described by the overlap of a p atomic orbital from one atom with an sp2 hybrid orbital from the other atom.

Question 12

What is the molecular geometry of SF4?

Accepted Answer

A)  tetrahedral 
B)  square pyramidal 
C)  seesaw 
D)  square planar 
E)  T-shaped 
A)  tetrahedral 
B)  square pyramidal 
C)  seesaw 
D)  square planar 
E)  T-shaped

Question 13

Identify the local molecular geometry and hybridization at atoms a and b in Ritalin, which is a drug used to treat attention deficit hyperactivity disorder. In the line drawing shown below, the hydrogen atoms bonded to carbon are not shown explicitly.

Accepted Answer

Both atoms a and b are sp³ hybr

Question 14

In VSEPR theory, molecular geometry is determined by __________

Accepted Answer

A)  electron-proton attractive forces. 
B)  electron-electron attractive forces. 
C)  electron-electron repulsive forces. 
D)  proton-proton repulsive forces. 
E)  electron-nucleus attractive forces. 
A)  electron-proton attractive forces. 
B)  electron-electron attractive forces. 
C)  electron-electron repulsive forces. 
D)  proton-proton repulsive forces. 
E)  electron-nucleus attractive forces.

Question 15

Which of the following compounds has a central atom with the same hybridization as PCl5?

Accepted Answer

A)  IF6+ 
B)  SiF4 
C)  BrF5 
D)  SbF5 
E)  XeF4 
A)  IF6+ 
B)  SiF4 
C)  BrF5 
D)  SbF5 
E)  XeF4

Question 16

Describe the valence bond picture of bonding in ethylene, which is shown below. Identify the number of valence electrons, the number of pi bonds, the number of sigma bonds, and the hybridization of the carbon atomic orbitals.

Accepted Answer

Ethylene has 12 vale

Question 17

Which type of molecular orbital has maximum electron density above and below the internuclear axis but zero density in a plane perpendicular to the internuclear axis?

Accepted Answer

A)  "F1F1F1S1F1F1F10" 
B)  "F1F1F1S1F1F1F10" 
C)  "F1F1F1S1F1F1F10*" 
D)  "F1F1F1S1F1F1F10*" 
E)  p 
A)  "F1F1F1S1F1F1F10" 
B)  "F1F1F1S1F1F1F10" 
C)  "F1F1F1S1F1F1F10*" 
D)  "F1F1F1S1F1F1F10*" 
E)  p

Question 18

What is the hybridization of the iodine atom in ICl3?

Accepted Answer

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

Question 19

What is the bond order of B2?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  1.5 
A)  0 
B)  1 
C)  2 
D)  3 
E)  1.5

Question 20

Which of the following has a central atom with the same hybridization as the oxygen in water?

Accepted Answer

A)  SO2 
B)  OCS 
C)  CS2 
D)  NH3 
E)  CO2 
A)  SO2 
B)  OCS 
C)  CS2 
D)  NH3 
E)  CO2

Which of the following shows the orientation of the net dipole for OCS?

Arrange the interactions between pairs of electrons in order of increasing strength.

What is the geometry of the triiodide ion (I₃^-)?

Which of the following has a central atom with the same hybridization as the carbon in formaldehyde (H₂CO)?

Which one of the following molecules has a bond order of 3?

What is the molecular geometry of SF₄O?

Using the energy level diagram below, determine the bond order of the PO molecule?

A Lewis structure of aspirin without the nonbonding electrons is shown in the figure below. Identify the hybridization of the C1 and C2 atomic orbitals. Arrange the bonds (B2-B5) in order of increasing length.

Which statement regarding a pi bond between two carbon atoms is correct?

What is the molecular geometry of SF₄?

Identify the local molecular geometry and hybridization at atoms a and b in Ritalin, which is a drug used to treat attention deficit hyperactivity disorder. In the line drawing shown below, the hydrogen atoms bonded to carbon are not shown explicitly.

In VSEPR theory, molecular geometry is determined by __________

Which of the following compounds has a central atom with the same hybridization as PCl₅?

Describe the valence bond picture of bonding in ethylene, which is shown below. Identify the number of valence electrons, the number of pi bonds, the number of sigma bonds, and the hybridization of the carbon atomic orbitals.

Which type of molecular orbital has maximum electron density above and below the internuclear axis but zero density in a plane perpendicular to the internuclear axis?

What is the hybridization of the iodine atom in ICl₃?

What is the bond order of B₂?

Which of the following has a central atom with the same hybridization as the oxygen in water?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Solution Chemistry and the Hydrosphere

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

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Exam 9: Molecular Geometry and Bonding Theories

Which of the following shows the orientation of the net dipole for OCS?

Arrange the interactions between pairs of electrons in order of increasing strength.

What is the geometry of the triiodide ion (I3-)?

Which of the following has a central atom with the same hybridization as the carbon in formaldehyde (H2CO)?

Which one of the following molecules has a bond order of 3?

What is the molecular geometry of SF4O?

Using the energy level diagram below, determine the bond order of the PO molecule?

A Lewis structure of aspirin without the nonbonding electrons is shown in the figure below. Identify the hybridization of the C1 and C2 atomic orbitals. Arrange the bonds (B2-B5) in order of increasing length.

Which statement regarding a pi bond between two carbon atoms is correct?

What is the molecular geometry of SF4?

Identify the local molecular geometry and hybridization at atoms a and b in Ritalin, which is a drug used to treat attention deficit hyperactivity disorder. In the line drawing shown below, the hydrogen atoms bonded to carbon are not shown explicitly.

In VSEPR theory, molecular geometry is determined by __________

Which of the following compounds has a central atom with the same hybridization as PCl5?

Describe the valence bond picture of bonding in ethylene, which is shown below. Identify the number of valence electrons, the number of pi bonds, the number of sigma bonds, and the hybridization of the carbon atomic orbitals.

Which type of molecular orbital has maximum electron density above and below the internuclear axis but zero density in a plane perpendicular to the internuclear axis?

What is the hybridization of the iodine atom in ICl3?

What is the bond order of B2?

Which of the following has a central atom with the same hybridization as the oxygen in water?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Solution Chemistry and the Hydrosphere

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

Filters

What is the geometry of the triiodide ion (I₃^-)?

Which of the following has a central atom with the same hybridization as the carbon in formaldehyde (H₂CO)?

What is the molecular geometry of SF₄O?

What is the molecular geometry of SF₄?

Which of the following compounds has a central atom with the same hybridization as PCl₅?

What is the hybridization of the iodine atom in ICl₃?

What is the bond order of B₂?