Question 1

There is/are ________ π bond(s)in the molecule below.

Accepted Answer

A) 7 
B) 6 
C) 2 
D) 1 
E) 0 
A) 7 
B) 6 
C) 2 
D) 1 
E) 0

Question 2

How many unhybridized p atomic orbital(s)are found in an sp-hybridized carbon atom?

Accepted Answer

A) 4 
B) 2 
C) 0 
D) 1 
E) 3 
A) 4 
B) 2 
C) 0 
D) 1 
E) 3

Question 3

Structural changes around a ________ bond in the retinal portion of the rhodopsin molecule trigger the chemical reactions that result in vision.

Accepted Answer

A) C=C 
B) C-C 
C) C   C 
D) C-H 
E) C=N 
A) C=C 
B) C-C 
C) C   C 
D) C-H 
E) C=N

Question 4

Which of the following molecules or ions will exhibit delocalized bonding?
NO2- NH4+ N3-

Accepted Answer

A) NH4+ and N3- 
B) NO2- only 
C) NO2-, NH4+, and N3- 
D) N3- only 
E) NO2- and N3- 
A) NH4+ and N3- 
B) NO2- only 
C) NO2-, NH4+, and N3- 
D) N3- only 
E) NO2- and N3-

Question 5

There are ________ σ bonds and ________ π bonds in H3C-CH2-CH   CH-CH2-C   CH.

Accepted Answer

A) 14, 2 
B) 10, 3 
C) 12, 2 
D) 13, 2 
E) 16, 3 
A) 14, 2 
B) 10, 3 
C) 12, 2 
D) 13, 2 
E) 16, 3

Question 6

The bond order of a homonuclear diatomic molecule can be decreased by ________.

Accepted Answer

A) removing electrons from a bonding MO or adding electrons to an antibonding MO 
B) adding electrons to a bonding MO or removing electrons from an antibonding MO 
C) adding electrons to any MO 
D) removing electrons from any MO 
E) The bond order of a homonuclear diatomic molecule cannot be decreased by any means. 
A) removing electrons from a bonding MO or adding electrons to an antibonding MO 
B) adding electrons to a bonding MO or removing electrons from an antibonding MO 
C) adding electrons to any MO 
D) removing electrons from any MO 
E) The bond order of a homonuclear diatomic molecule cannot be decreased by any means.

Question 7

In the valence shell of an atom there are six electron domains.They will be arranged in a(n)________ geometry.

Accepted Answer

The answer of In the valence shell of an atom...

Question 8

The basis of the VSEPR model of molecular bonding is ________.

Accepted Answer

A) regions of electron density on an atom will organize themselves so as to maximize s-character 
B) regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap 
C) atomic orbitals of the bonding atoms must overlap for a bond to form 
D) electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions 
E) hybrid orbitals will form as necessary to, as closely as possible, achieve spherical symmetry 
A) regions of electron density on an atom will organize themselves so as to maximize s-character 
B) regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap 
C) atomic orbitals of the bonding atoms must overlap for a bond to form 
D) electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions 
E) hybrid orbitals will form as necessary to, as closely as possible, achieve spherical symmetry

Question 9

An antibonding π orbital contains a maximum of ________ electrons.

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
E) 8 
A) 1 
B) 2 
C) 4 
D) 6 
E) 8

Question 10

Using the VSEPR model,the molecular geometry of the central atom in IF5 is ________.

Accepted Answer

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

Question 11

Which of the following molecules or ions have various resonance structures?
CO2 O3 CO32-

Accepted Answer

A) CO2, O3, and CO32- 
B) CO2 and O3 
C) O3 and CO32- 
D) CO32- only 
E) None of the above will exhibit delocalized bonding. 
A) CO2, O3, and CO32- 
B) CO2 and O3 
C) O3 and CO32- 
D) CO32- only 
E) None of the above will exhibit delocalized bonding.

Question 12

According to molecular orbital theory,the greater the ________ ,the shorter the bond length.

Accepted Answer

The answer of According to molecular orbital theory,the greater the...

Question 13

The bond angles marked a,b,and c in the molecule below are about ________,________,and ________,respectively.

Accepted Answer

A) 109.5°, 109.5°, 109.5° 
B) 120°, 109.5°, 120° 
C) 109.5°, 109.5°, 120° 
D) 90°, 180°, 90° 
E) 109.5°, 109.5°, 90° 
A) 109.5°, 109.5°, 109.5° 
B) 120°, 109.5°, 120° 
C) 109.5°, 109.5°, 120° 
D) 90°, 180°, 90° 
E) 109.5°, 109.5°, 90°

Question 14

Using the VSEPR model,the electron-domain geometry of the central atom in ClO3- is ________.

Accepted Answer

A) linear 
B) trigonal planar 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral 
A) linear 
B) trigonal planar 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral

Question 15

In comparing the same two atoms bonded together,the ________ the bond order,the ________ the bond length,and the ________ the bond energy.

Accepted Answer

A) greater, shorter, greater 
B) greater, greater, greater 
C) greater, longer, greater 
D) smaller, longer, smaller 
E) smaller, greater, greater 
A) greater, shorter, greater 
B) greater, greater, greater 
C) greater, longer, greater 
D) smaller, longer, smaller 
E) smaller, greater, greater

Question 16

The electron-domain geometry and molecular geometry of the nitrite ion are ________ and ________,respectively.

Accepted Answer

A) trigonal bipyramidal, trigonal planar 
B) tetrahedral, trigonal pyramidal 
C) trigonal bipyramidal,T-shaped 
D) trigonal planar, bent 
E) T-shaped, trigonal planar 
A) trigonal bipyramidal, trigonal planar 
B) tetrahedral, trigonal pyramidal 
C) trigonal bipyramidal,T-shaped 
D) trigonal planar, bent 
E) T-shaped, trigonal planar

Question 17

According to molecular orbital theory,the bond order in a Be2 molecule is ________.

Accepted Answer

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

Question 18

The ________ hydrogen orbital overlaps with the ________ bromide orbital in HBr.

Accepted Answer

The answer of The ________ hydrogen orbital overlaps with the...

Question 19

A typical double bond ________.

Accepted Answer

A) is stronger and shorter than a single bond 
B) consists of one σ bond and one π bond 
C) imparts rigidity to a molecule 
D) consists of two shared electron pairs 
E) All of the above answers are correct. 
A) is stronger and shorter than a single bond 
B) consists of one σ bond and one π bond 
C) imparts rigidity to a molecule 
D) consists of two shared electron pairs 
E) All of the above answers are correct.

Question 20

Which of the following is expected to be paramagnetic?

Accepted Answer

A) F2 
B) O2 
C) N2 
D) H2 
E) He 
A) F2 
B) O2 
C) N2 
D) H2 
E) He

Exam 9: Molecular Geometry and Bonding Theories

There is/are ________ π bond(s)in the molecule below.

How many unhybridized p atomic orbital(s)are found in an sp-hybridized carbon atom?

Structural changes around a ________ bond in the retinal portion of the rhodopsin molecule trigger the chemical reactions that result in vision.

Which of the following molecules or ions will exhibit delocalized bonding? NO2- NH4+ N3-

There are ________ σ bonds and ________ π bonds in H3C-CH2-CH CH-CH2-C CH.

The bond order of a homonuclear diatomic molecule can be decreased by ________.

In the valence shell of an atom there are six electron domains.They will be arranged in a(n)________ geometry.

The basis of the VSEPR model of molecular bonding is ________.

An antibonding π orbital contains a maximum of ________ electrons.

Using the VSEPR model,the molecular geometry of the central atom in IF5 is ________.

Which of the following molecules or ions have various resonance structures? CO2 O3 CO32-

According to molecular orbital theory,the greater the ________ ,the shorter the bond length.

The bond angles marked a,b,and c in the molecule below are about ________,________,and ________,respectively.

Using the VSEPR model,the electron-domain geometry of the central atom in ClO3- is ________.

In comparing the same two atoms bonded together,the ________ the bond order,the ________ the bond length,and the ________ the bond energy.

The electron-domain geometry and molecular geometry of the nitrite ion are ________ and ________,respectively.

According to molecular orbital theory,the bond order in a Be2 molecule is ________.

The ________ hydrogen orbital overlaps with the ________ bromide orbital in HBr.

A typical double bond ________.

Which of the following is expected to be paramagnetic?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

Which of the following molecules or ions will exhibit delocalized bonding? NO₂^- NH₄⁺ N₃^-

There are σ bonds and π bonds in H₃C-CH₂-CH CH-CH₂-C CH.

Using the VSEPR model,the molecular geometry of the central atom in IF₅ is ________.

Which of the following molecules or ions have various resonance structures? CO₂ O₃ CO₃^2-

The bond angles marked a,b,and c in the molecule below are about ,,and ,respectively.

Using the VSEPR model,the electron-domain geometry of the central atom in ClO₃^- is ________.

In comparing the same two atoms bonded together,the the bond order,the the bond length,and the the bond energy.

The electron-domain geometry and molecular geometry of the nitrite ion are and ,respectively.

According to molecular orbital theory,the bond order in a Be₂ molecule is ________.

The hydrogen orbital overlaps with the bromide orbital in HBr.