Question 1

When an atom in a molecule or ion is described as sp3 hybridized, its electron pair geometry is

Accepted Answer

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

Question 2

What is the hybridization of the central atom in a molecule with a trigonal-planar molecular geometry?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  none 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  none B

Question 3

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. Which of the following is the correct molecular orbital configuration of F2?

Accepted Answer

A)  [core electrons] (σ2s)2 (σ*2s)2 (σ2p)2 (π2p)4 (σ*2p)2 
B)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)2 (σ2p)2 (π*2p)2 
C)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)4 (π*2p)4 
D)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)4 (σ2p)2 (π*2p)6 
E)  [core electrons] (σ2s)2 (σ*2s)2 (σ2p)2 (π2p)4 (π*2p)4 
A)  [core electrons] (σ2s)2 (σ*2s)2 (σ2p)2 (π2p)4 (σ*2p)2 
B)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)2 (σ2p)2 (π*2p)2 
C)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)4 (π*2p)4 
D)  [core electrons] (σ2s)2 (σ*2s)2 (π2p)4 (σ2p)2 (π*2p)6 
E)  [core electrons] (σ2s)2 (σ*2s)2 (σ2p)2 (π2p)4 (π*2p)4 E

Question 4

Draw a Lewis structure of xenon trioxide. What is the hybridization of the xenon atom in this molecule?

Accepted Answer

The hybrid

Question 5

For which of the following compounds is it possible for cis and trans isomers to exist?

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1, 2, and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1, 2, and 3

Question 6

What is the bond order for a molecule with 2 electrons in bonding molecular orbitals and 1 electrons in antibonding molecular orbitals?

Accepted Answer

A)  0 
B)  0.5 
C)  1 
D)  1.5 
E)  2 
A)  0 
B)  0.5 
C)  1 
D)  1.5 
E)  2

Question 7

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. According to molecular orbital theory, which of the following species will have only one unpaired electron?

Accepted Answer

A)  C2 
B)  Ne22+ 
C)  O22- 
D)  N2 
E)  O2+ 
A)  C2 
B)  Ne22+ 
C)  O22- 
D)  N2 
E)  O2+

Question 8

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to diagram 9-1. Identify the molecule or ion with the longest bond length.

Accepted Answer

A)  O2 
B)  O2+ 
C)  O2- 
D)  O22- 
E)  O22+ 
A)  O2 
B)  O2+ 
C)  O2- 
D)  O22- 
E)  O22+

Question 9

To form a molecule with a tetrahedral electron pair geometry, what set of pure atomic orbitals must be mixed?

Accepted Answer

A)  one s and three p 
B)  two s and two p 
C)  zero s and two p 
D)  two s and one p 
E)  zero s and three p 
A)  one s and three p 
B)  two s and two p 
C)  zero s and two p 
D)  two s and one p 
E)  zero s and three p

Question 10

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. According to molecular orbital theory, which of the following species will have the lowest bond order?

Accepted Answer

A)  He2+ 
B)  H2 
C)  C2+ 
D)  F22+ 
E)  F2 
A)  He2+ 
B)  H2 
C)  C2+ 
D)  F22+ 
E)  F2

Question 11

Upon combustion, ethene (C2H4) is converted to carbon dioxide and water.What change occurs in the hybridization of carbon atoms in this reaction?

Accepted Answer

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

Question 12

For which of the following molecules and ions does the central atom have sp2 hybridization? (The central atom is listed first in each formula below.)

Accepted Answer

A)  SO42- 
B)  CO2 
C)  NOBr 
D)  SBr2 
E)  N2O 
A)  SO42- 
B)  CO2 
C)  NOBr 
D)  SBr2 
E)  N2O

Question 13

Which of the labeled carbon atoms (C1-C4) is/are sp hybridized?

Accepted Answer

A)  C1 
B)  C1 and C2 
C)  C3 
D)  C2 and C4 
E)  C1 and C3 
A)  C1 
B)  C1 and C2 
C)  C3 
D)  C2 and C4 
E)  C1 and C3

Question 14

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. Consider the molecules B2, C2, N2 and F2. Which two molecules have the same bond order?

Accepted Answer

A)  B2 and C2 
B)  B2 and F2 
C)  C2 and N2 
D)  C2 and F2 
E)  N2 and F2 
A)  B2 and C2 
B)  B2 and F2 
C)  C2 and N2 
D)  C2 and F2 
E)  N2 and F2

Question 15

The following valence molecular orbital energy level diagram is appropriate for which one of the listed species?

Accepted Answer

A)  B22+ 
B)  C22+ 
C)  N22+ 
D)  O22+ 
E)  F22+ 
A)  B22+ 
B)  C22+ 
C)  N22+ 
D)  O22+ 
E)  F22+

Question 16

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. According to molecular orbital theory, which of the following lists ranks the fluorine species in terms of increasing bond order?

Accepted Answer

A)  F22+ 22- 2 
B)  F22- 2 22+ 
C)  F2 22+ 22- 
D)  F2 22- 22+ 
E)  F22+ 2 22- 
A)  F22+ 22- 2 
B)  F22- 2 22+ 
C)  F2 22+ 22- 
D)  F2 22- 22+ 
E)  F22+ 2 22-

Question 17

All of the following statements concerning molecular orbital (MO) theory are correct EXCEPT

Accepted Answer

A)  the Pauli exclusion principle is obeyed. 
B)  Hund's rule is obeyed. 
C)  electrons are assigned to orbitals of successively higher energy. 
D)  a bonding molecular orbital is lower in energy than its parent atomic orbitals. 
E)  the combination of two atomic orbitals creates only one molecular orbital. 
A)  the Pauli exclusion principle is obeyed. 
B)  Hund's rule is obeyed. 
C)  electrons are assigned to orbitals of successively higher energy. 
D)  a bonding molecular orbital is lower in energy than its parent atomic orbitals. 
E)  the combination of two atomic orbitals creates only one molecular orbital.

Question 18

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. According to molecular orbital theory, which of the following species will have the highest bond order?

Accepted Answer

A)  H2- 
B)  Li2 
C)  C2+ 
D)  N2 
E)  H2 
A)  H2- 
B)  Li2 
C)  C2+ 
D)  N2 
E)  H2

Question 19

Which of the following molecules has the below valence molecular orbital energy level diagram?

Accepted Answer

A)  Li2 
B)  Be2 
C)  B2 
D)  C2 
E)  N2 
A)  Li2 
B)  Be2 
C)  B2 
D)  C2 
E)  N2

Question 20

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. Assuming that the molecular orbital energy diagram for a homonuclear diatomic molecule applies to a heteronuclear diatomic molecule, determine which of the following species has the highest bond order.

Accepted Answer

A)  NO- 
B)  OF- 
C)  C2 
D)  O22- 
E)  NO+ 
A)  NO- 
B)  OF- 
C)  C2 
D)  O22- 
E)  NO+

When an atom in a molecule or ion is described as sp³ hybridized, its electron pair geometry is

What is the hybridization of the central atom in a molecule with a trigonal-planar molecular geometry?

Draw a Lewis structure of xenon trioxide. What is the hybridization of the xenon atom in this molecule?

For which of the following compounds is it possible for cis and trans isomers to exist?

What is the bond order for a molecule with 2 electrons in bonding molecular orbitals and 1 electrons in antibonding molecular orbitals?

To form a molecule with a tetrahedral electron pair geometry, what set of pure atomic orbitals must be mixed?

Upon combustion, ethene (C₂H₄) is converted to carbon dioxide and water.What change occurs in the hybridization of carbon atoms in this reaction?

For which of the following molecules and ions does the central atom have sp² hybridization? (The central atom is listed first in each formula below.)

Which of the labeled carbon atoms (C₁-C₄) is/are sp hybridized?

The following valence molecular orbital energy level diagram is appropriate for which one of the listed species?

All of the following statements concerning molecular orbital (MO) theory are correct EXCEPT

Which of the following molecules has the below valence molecular orbital energy level diagram?

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Exam 10: Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

When an atom in a molecule or ion is described as sp3 hybridized, its electron pair geometry is

What is the hybridization of the central atom in a molecule with a trigonal-planar molecular geometry?

Draw a Lewis structure of xenon trioxide. What is the hybridization of the xenon atom in this molecule?

For which of the following compounds is it possible for cis and trans isomers to exist?

What is the bond order for a molecule with 2 electrons in bonding molecular orbitals and 1 electrons in antibonding molecular orbitals?

To form a molecule with a tetrahedral electron pair geometry, what set of pure atomic orbitals must be mixed?

Upon combustion, ethene (C2H4) is converted to carbon dioxide and water.What change occurs in the hybridization of carbon atoms in this reaction?

For which of the following molecules and ions does the central atom have sp2 hybridization? (The central atom is listed first in each formula below.)

Which of the labeled carbon atoms (C1-C4) is/are sp hybridized?

The following valence molecular orbital energy level diagram is appropriate for which one of the listed species?

All of the following statements concerning molecular orbital (MO) theory are correct EXCEPT

Which of the following molecules has the below valence molecular orbital energy level diagram?

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

When an atom in a molecule or ion is described as sp³ hybridized, its electron pair geometry is

Upon combustion, ethene (C₂H₄) is converted to carbon dioxide and water.What change occurs in the hybridization of carbon atoms in this reaction?

For which of the following molecules and ions does the central atom have sp² hybridization? (The central atom is listed first in each formula below.)

Which of the labeled carbon atoms (C₁-C₄) is/are sp hybridized?