Question 1

What would be the bond order of the N-C bonds in the benzene-like molecule (C5H5N)?

Accepted Answer

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

Question 2

If the HCOO- ion is described using delocalized electrons,why can the oxygen atoms not have sp3 hybrids?

Accepted Answer

A) There must be an unhybridized p orbital to form the pi bond system. 
B) The s orbital must be unhybridized to form the pi bond system. 
C) There is no hybridization in systems with delocalized electrons. 
D) Molecular orbital theory does not include hybridization. 
E) The four lobes repel each other too strongly. 
A) There must be an unhybridized p orbital to form the pi bond system. 
B) The s orbital must be unhybridized to form the pi bond system. 
C) There is no hybridization in systems with delocalized electrons. 
D) Molecular orbital theory does not include hybridization. 
E) The four lobes repel each other too strongly.

Question 3

Choose the INCORRECT statement about NH4+.

Accepted Answer

A) The hybridization of N is sp3. 
B) The molecule is tetrahedral. 
C) There is one lone pair of electrons on N. 
D) There are no π bonds. 
E) There are four σ bonds. 
A) The hybridization of N is sp3. 
B) The molecule is tetrahedral. 
C) There is one lone pair of electrons on N. 
D) There are no π bonds. 
E) There are four σ bonds.

Question 4

The description of covalent bond formation as a region of high electronic charge density resulting from overlap of atomic orbitals between the two bonded atoms is referred to as:

Accepted Answer

A) atomic orbital theory 
B) the electron-sea model 
C) hybridization theory 
D) valence-bond method 
E) VSEPR method 
A) atomic orbital theory 
B) the electron-sea model 
C) hybridization theory 
D) valence-bond method 
E) VSEPR method

What would be the bond order of the N-C bonds in the benzene-like molecule (C₅H₅N)?

If the HCOO^- ion is described using delocalized electrons,why can the oxygen atoms not have sp³ hybrids?

Choose the INCORRECT statement about NH₄⁺.

The description of covalent bond formation as a region of high electronic charge density resulting from overlap of atomic orbitals between the two bonded atoms is referred to as:

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Exam 11: Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

What would be the bond order of the N-C bonds in the benzene-like molecule (C5H5N)?

If the HCOO- ion is described using delocalized electrons,why can the oxygen atoms not have sp3 hybrids?

Choose the INCORRECT statement about NH4+.

The description of covalent bond formation as a region of high electronic charge density resulting from overlap of atomic orbitals between the two bonded atoms is referred to as:

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What would be the bond order of the N-C bonds in the benzene-like molecule (C₅H₅N)?

If the HCOO^- ion is described using delocalized electrons,why can the oxygen atoms not have sp³ hybrids?

Choose the INCORRECT statement about NH₄⁺.