Question 1

What is the hybridization of the sulfur atom in SCl2?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  None of these 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  None of these

Question 2

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 3

Refer to Diagram 9-1.What is the molecular orbital configuration of N22+?

Accepted Answer

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

Question 4

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 5

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

Question 6

SF3+,has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry.The hybridization of the central sulfur atom is ________.

Accepted Answer

Question 7

Nitric acid,HNO3,dissociates in water to form nitrate ions and hydronium ions.What change in hybridization of the nitrogen atom occurs in this dissociation?

Accepted Answer

A)  sp2 to sp3 
B)  sp2 to sp 
C)  sp3 to sp 
D)  sp to sp3 
E)  no change 
A)  sp2 to sp3 
B)  sp2 to sp 
C)  sp3 to sp 
D)  sp to sp3 
E)  no change

Question 8

Benzene,C6H6,consists of a six member ring of sp2 hybridized carbon atoms.Each carbon atom has one unhybridized p orbital.How many π2p bonding,antibonding,and nonbonding molecular orbitals exist for benzene?

Accepted Answer

A)  Three π2p molecular orbitals exist; two bonding and one antibonding. 
B)  Three π2p molecular orbitals exist; one bonding,one antibonding,and one nonbonding. 
C)  Six π2p molecular orbitals exist; three bonding and three antibonding. 
D)  Six π2p molecular orbitals exist; two bonding,two nonbonding,and two antibonding. 
E)  Twelve π2p molecular orbitals exist; six bonding and six antibonding. 
A)  Three π2p molecular orbitals exist; two bonding and one antibonding. 
B)  Three π2p molecular orbitals exist; one bonding,one antibonding,and one nonbonding. 
C)  Six π2p molecular orbitals exist; three bonding and three antibonding. 
D)  Six π2p molecular orbitals exist; two bonding,two nonbonding,and two antibonding. 
E)  Twelve π2p molecular orbitals exist; six bonding and six antibonding.

Question 9

The hybridization of the nitrogen atom in NH3 is _____.

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  sp6 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  sp6

Question 10

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 11

In HF2− the hydrogen is shared between the two fluorine atoms.Which theory,valence bond or molecule orbital,correctly accounts for this three-center bonding?

Accepted Answer

molecular

Question 12

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 13

Refer to Diagram 9-1.According to molecular orbital theory,which of the following species will be diamagnetic?

Accepted Answer

A)  O2 
B)  C2+ 
C)  F2- 
D)  H2 
E)  Li2+ 
A)  O2 
B)  C2+ 
C)  F2- 
D)  H2 
E)  Li2+

Question 14

Ammonia reacts with oxygen and water to produce nitric acid.What change in hybridization of the nitrogen atom occurs in this reaction?

Accepted Answer

A)  sp3 to sp2 
B)  sp3 to sp 
C)  sp2 to sp3 
D)  sp2 to sp 
E)  no change 
A)  sp3 to sp2 
B)  sp3 to sp 
C)  sp2 to sp3 
D)  sp2 to sp 
E)  no change

Question 15

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 16

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 17

In the context of valence shell electron pair repulsion (VSEPR)theory,what is the molecular geometry around a central atom that is sp3 hybridized and has one lone pair of electrons?

Accepted Answer

A)  Bent 
B)  Linear 
C)  Trigonal-planar 
D)  Trigonal-pyramidal 
E)  Tetrahedral 
A)  Bent 
B)  Linear 
C)  Trigonal-planar 
D)  Trigonal-pyramidal 
E)  Tetrahedral

Question 18

Refer to Diagram 9-1.According to molecular orbital theory,what is the bond order of Ne22+?

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 19

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 20

What is the maximum number of hybridized orbitals that can be formed by afluorine atom?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

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

What is the hybridization of the sulfur atom in SCl2?

Refer to diagram 9-1.Identify the molecule or ion with the longest bond length.

Refer to Diagram 9-1.What is the molecular orbital configuration of N22+?

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

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

SF3+,has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry.The hybridization of the central sulfur atom is ________.

Nitric acid,HNO3,dissociates in water to form nitrate ions and hydronium ions.What change in hybridization of the nitrogen atom occurs in this dissociation?

Benzene,C6H6,consists of a six member ring of sp2 hybridized carbon atoms.Each carbon atom has one unhybridized p orbital.How many π2p bonding,antibonding,and nonbonding molecular orbitals exist for benzene?

The hybridization of the nitrogen atom in NH3 is _____.

Refer to Diagram 9-1.According to molecular orbital theory,which of the following species will have the highest bond order?

In HF2− the hydrogen is shared between the two fluorine atoms.Which theory,valence bond or molecule orbital,correctly accounts for this three-center bonding?

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

Refer to Diagram 9-1.According to molecular orbital theory,which of the following species will be diamagnetic?

Ammonia reacts with oxygen and water to produce nitric acid.What change in hybridization of the nitrogen atom occurs in this reaction?

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

Refer to Diagram 9-1.Consider the molecules B2,C2,N2 and F2.Which two molecules have the same bond order?

In the context of valence shell electron pair repulsion (VSEPR)theory,what is the molecular geometry around a central atom that is sp3 hybridized and has one lone pair of electrons?

Refer to Diagram 9-1.According to molecular orbital theory,what is the bond order of Ne22+?

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

What is the maximum number of hybridized orbitals that can be formed by afluorine atom?

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

What is the hybridization of the sulfur atom in SCl₂?

Refer to Diagram 9-1.What is the molecular orbital configuration of N₂²⁺?

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

SF₃⁺,has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry.The hybridization of the central sulfur atom is ________.

Nitric acid,HNO₃,dissociates in water to form nitrate ions and hydronium ions.What change in hybridization of the nitrogen atom occurs in this dissociation?

Benzene,C₆H₆,consists of a six member ring of sp² hybridized carbon atoms.Each carbon atom has one unhybridized p orbital.How many π_2p bonding,antibonding,and nonbonding molecular orbitals exist for benzene?

The hybridization of the nitrogen atom in NH₃ is _____.

In HF₂− the hydrogen is shared between the two fluorine atoms.Which theory,valence bond or molecule orbital,correctly accounts for this three-center bonding?

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

Refer to Diagram 9-1.Consider the molecules B₂,C₂,N₂ and F₂.Which two molecules have the same bond order?

In the context of valence shell electron pair repulsion (VSEPR)theory,what is the molecular geometry around a central atom that is sp³ hybridized and has one lone pair of electrons?

Refer to Diagram 9-1.According to molecular orbital theory,what is the bond order of Ne₂2+?

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