Question 1

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 2

For a molecule with the formula AB3, the molecular shape is ________.

Accepted Answer

A) linear, octahedral, or bent 
B) linear, bent, or trigonal planar 
C) linear, bent, or T-shaped 
D) tetrahedral 
E) trigonal planar, trigonal pyramidal, or T-shaped 
A) linear, octahedral, or bent 
B) linear, bent, or trigonal planar 
C) linear, bent, or T-shaped 
D) tetrahedral 
E) trigonal planar, trigonal pyramidal, or T-shaped

Question 3

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

Accepted Answer

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

Question 4

The blending of one s atomic orbital and one p atomic orbital produces ________.

Accepted Answer

A) two sp hybrid orbitals 
B) two sp2 hybrid orbitals 
C) two sp3 hybrid orbitals 
D) three sp hybrid orbitals 
E) three sp2 hybrid orbitals 
A) two sp hybrid orbitals 
B) two sp2 hybrid orbitals 
C) two sp3 hybrid orbitals 
D) three sp hybrid orbitals 
E) three sp2 hybrid orbitals

Question 5

The molecular geometry of the H3O+ ion is ________.

Accepted Answer

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

Question 6

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 7

The F-N-F bond angle in the NF3 molecule is slightly less than ________.

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) 60° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) 60°

Question 8

According to MO theory, overlap of two p atomic orbitals produces ________.

Accepted Answer

A) one π MO and one σ* MO 
B) one π MO and one σ MO 
C) one π MO and one π* MO or one σ MO and one σ* MO 
D) one π+ MO and one σ* MO 
E) two π MOs, two π+ MOs, one σ MO, and one σ* MO 
A) one π MO and one σ* MO 
B) one π MO and one σ MO 
C) one π MO and one π* MO or one σ MO and one σ* MO 
D) one π+ MO and one σ* MO 
E) two π MOs, two π+ MOs, one σ MO, and one σ* MO

Question 9

Boron trifluoride has three bonding domains, and its electron domain geometry is trigonal planar.

Accepted Answer

A) True 
 B)False

Question 10

In a typical multiple bond, the σ bond results from overlap of ________ orbitals and the π bond(s)result from overlap of ________ orbitals.

Accepted Answer

A) hybrid, atomic 
B) hybrid, hybrid 
C) atomic, hybrid 
D) hybrid, hybrid or atomic 
E) hybrid or atomic, hybrid or atomic 
A) hybrid, atomic 
B) hybrid, hybrid 
C) atomic, hybrid 
D) hybrid, hybrid or atomic 
E) hybrid or atomic, hybrid or atomic

Question 11

Electrons in core orbitals contribute to atom bonding.

Accepted Answer

A) True 
 B)False

Question 12

The hybrid orbital set used by the central atom in PCl5 is ________.

Accepted Answer

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

Question 13

The molecular geometry of the PF4+ ion is ________.

Accepted Answer

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

Question 14

According to MO theory, overlap of two s atomic orbitals produces ________.

Accepted Answer

A) one bonding molecular orbital and one hybrid orbital 
B) two bonding molecular orbitals 
C) two bonding molecular orbitals and two antibonding molecular orbitals 
D) two bonding molecular orbitals and one antibonding molecular orbital 
E) one bonding molecular orbital and one antibonding molecular orbital 
A) one bonding molecular orbital and one hybrid orbital 
B) two bonding molecular orbitals 
C) two bonding molecular orbitals and two antibonding molecular orbitals 
D) two bonding molecular orbitals and one antibonding molecular orbital 
E) one bonding molecular orbital and one antibonding molecular orbital

Question 15

The Lewis structure of carbon dioxide is given below. The hybridization of the carbon atom in carbon dioxide is ________.

Accepted Answer

A) sp3 
B) sp2 
C) sp 
D) sp2d 
E) sp2d2 
A) sp3 
B) sp2 
C) sp 
D) sp2d 
E) sp2d2

Question 16

A molecular orbital can accommodate a maximum of ________ electron(s).

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
E) 12 
A) 1 
B) 2 
C) 4 
D) 6 
E) 12

Question 17

The order of MO energies in B2, C2, and N2 (σ2p > π2p), is different from the order in O2, F2, and Ne2 (σ2p > π2p). This is due to ________.

Accepted Answer

A) less effective overlap of p orbitals in O2, F2, and Ne2 
B) the more metallic character of boron, carbon and nitrogen as compared to oxygen, fluorine, and neon 
C) greater 2s-2p interaction in O2, F2, and Ne2 
D) greater 2s-2p interaction in B2, C2, and N2 
E) less effective overlap of p orbitals in B2, C2, and N2 
A) less effective overlap of p orbitals in O2, F2, and Ne2 
B) the more metallic character of boron, carbon and nitrogen as compared to oxygen, fluorine, and neon 
C) greater 2s-2p interaction in O2, F2, and Ne2 
D) greater 2s-2p interaction in B2, C2, and N2 
E) less effective overlap of p orbitals in B2, C2, and N2

Question 18

The molecular geometry of the BrO3- ion is ________.

Accepted Answer

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

Question 19

For molecules of the general formula ABn, n can be greater than four ________.

Accepted Answer

A) for any element A 
B) only when A is an element from the third period or below the third period 
C) only when A is boron or beryllium 
D) only when A is carbon 
E) only when A is Xe 
A) for any element A 
B) only when A is an element from the third period or below the third period 
C) only when A is boron or beryllium 
D) only when A is carbon 
E) only when A is Xe

Question 20

Of the following, only ________ appears to gain mass in a magnetic field.

Accepted Answer

A) C2 
B) N2 
C) F2 
D) O2 
E) Li2 
A) C2 
B) N2 
C) F2 
D) O2 
E) Li2

Exam 9: Molecular Geometry and Bonding Theories

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

For a molecule with the formula AB3, the molecular shape is ________.

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

The blending of one s atomic orbital and one p atomic orbital produces ________.

The molecular geometry of the H3O+ ion is ________.

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

The F-N-F bond angle in the NF3 molecule is slightly less than ________.

According to MO theory, overlap of two p atomic orbitals produces ________.

Boron trifluoride has three bonding domains, and its electron domain geometry is trigonal planar.

In a typical multiple bond, the σ bond results from overlap of ________ orbitals and the π bond(s)result from overlap of ________ orbitals.

Electrons in core orbitals contribute to atom bonding.

The hybrid orbital set used by the central atom in PCl5 is ________.

The molecular geometry of the PF4+ ion is ________.

According to MO theory, overlap of two s atomic orbitals produces ________.

The Lewis structure of carbon dioxide is given below. The hybridization of the carbon atom in carbon dioxide is ________.

A molecular orbital can accommodate a maximum of ________ electron(s).

The order of MO energies in B2, C2, and N2 (σ2p > π2p), is different from the order in O2, F2, and Ne2 (σ2p > π2p). This is due to ________.

The molecular geometry of the BrO3- ion is ________.

For molecules of the general formula ABn, n can be greater than four ________.

Of the following, only ________ appears to gain mass in a magnetic field.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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

For a molecule with the formula AB₃, the molecular shape is ________.

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

The molecular geometry of the H₃O⁺ ion is ________.

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

The F-N-F bond angle in the NF₃molecule is slightly less than ________.

In a typical multiple bond, the σ bond results from overlap of orbitals and the π bond(s)result from overlap of orbitals.

The hybrid orbital set used by the central atom in PCl₅ is ________.

The molecular geometry of the PF₄⁺ ion is ________.

The order of MO energies in B₂, C₂, and N₂ (σ_2p > π_2p), is different from the order in O₂, F₂, and Ne₂ (σ_2p > π_2p). This is due to ________.

The molecular geometry of the BrO₃^- ion is ________.

For molecules of the general formula AB_n, n can be greater than four ________.