Question 1

What is the predicted O-C-O bond angle in CO2?

Accepted Answer

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

Question 2

According to molecular orbital theory, what is the bond order of the hypofluorite ion, OF-?

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 3

Which figure best illustrates the hybrid orbitals on phosphorous in PH3?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 4

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF2-?

Accepted Answer

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

Question 5

Indicate the type of hybrid orbitals used by the central atom in SF6.

Accepted Answer

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

Question 6

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp, sp2, and sp3?

Accepted Answer

A)  C3H6 
B)  C4H4 
C)  C4H6 
D)  C5H6 
E)  C5H8 
A)  C3H6 
B)  C4H4 
C)  C4H6 
D)  C5H6 
E)  C5H8

Question 7

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry, such as ClF5?

Accepted Answer

A)  5 
B)  2 
C)  3 
D)  4 
E)  6 
A)  5 
B)  2 
C)  3 
D)  4 
E)  6

Question 8

How many electron domains are on the central atom for a sp2 hybridized atom?

Accepted Answer

Question 9

The hybridization of the central nitrogen atom in the molecule N2O is

Accepted Answer

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

Question 10

Allene, C3H4 (shown below), is one component of gas used for high-temperature welding. According to the valence bond model, which is a proper description of the bonding on the central carbon atom in allene?

Accepted Answer

A)  It shares four   bonds, two with each carbon atom on either side. 
B)  It shares four σ bonds, two with each carbon atom on either side. 
C)  It shares one σ bond and one   bond with each carbon atom on either side. 
D)  It shares two σ bonds with the carbon atom on the left, and two   bonds with the carbon atom on the right. 
E)  It shares two σ bonds with the carbon atom on the right, and two   bonds with the carbon atom on the left. 
A)  It shares four   bonds, two with each carbon atom on either side. 
B)  It shares four σ bonds, two with each carbon atom on either side. 
C)  It shares one σ bond and one   bond with each carbon atom on either side. 
D)  It shares two σ bonds with the carbon atom on the left, and two   bonds with the carbon atom on the right. 
E)  It shares two σ bonds with the carbon atom on the right, and two   bonds with the carbon atom on the left.

Question 11

The PCl5 molecule has

Accepted Answer

A)  nonpolar bonds, and is a nonpolar molecule. 
B)  nonpolar bonds, but is a polar molecule. 
C)  polar bonds, and is a polar molecule. 
D)  polar bonds, but is a nonpolar molecule. 
A)  nonpolar bonds, and is a nonpolar molecule. 
B)  nonpolar bonds, but is a polar molecule. 
C)  polar bonds, and is a polar molecule. 
D)  polar bonds, but is a nonpolar molecule.

Question 12

The number of π bonds in phosgene, COCl2, is

Accepted Answer

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

Question 13

What is the molecular geometry of HOF as predicted by the VSEPR model?

Accepted Answer

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

Question 14

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry, such as SF4?

Accepted Answer

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

Question 15

The BrF5 molecule has polar bonds and has a net dipole moment.

Accepted Answer

A) True 
 B)False

Question 16

Consider the species N2-, N2, and N2+. Which of these species will be paramagnetic?

Accepted Answer

A)  N2 and N2- 
B)  N2+ and N2 
C)  N2+ and N2-  
D)  N2-, N2, and N2+ 
E)  None is paramagnetic. 
A)  N2 and N2- 
B)  N2+ and N2 
C)  N2+ and N2-  
D)  N2-, N2, and N2+ 
E)  None is paramagnetic.

Question 17

What is the molecular geometry of SiF62- as predicted by the VSEPR model?

Accepted Answer

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

Question 18

Atoms of period 3 and beyond can undergo sp3d2 hybridization, but atoms of period 2 cannot.

Accepted Answer

A) True 
 B)False

Question 19

Which figure best illustrates the hybrid orbitals on carbon in benzene, C6H6?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

In one sentence state the basic principle of valence bond theory.

Accepted Answer

A covalent bond forms when the

Exam 9: Chemical Bonding II: Molecular Geometry and Bonding Theories

What is the predicted O-C-O bond angle in CO2?

According to molecular orbital theory, what is the bond order of the hypofluorite ion, OF-?

Which figure best illustrates the hybrid orbitals on phosphorous in PH3?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF2-?

Indicate the type of hybrid orbitals used by the central atom in SF6.

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp, sp2, and sp3?

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry, such as ClF5?

How many electron domains are on the central atom for a sp2 hybridized atom?

The hybridization of the central nitrogen atom in the molecule N2O is

Allene, C3H4 (shown below), is one component of gas used for high-temperature welding. According to the valence bond model, which is a proper description of the bonding on the central carbon atom in allene?

The PCl5 molecule has

The number of π bonds in phosgene, COCl2, is

What is the molecular geometry of HOF as predicted by the VSEPR model?

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry, such as SF4?

The BrF5 molecule has polar bonds and has a net dipole moment.

Consider the species N2-, N2, and N2+. Which of these species will be paramagnetic?

What is the molecular geometry of SiF62- as predicted by the VSEPR model?

Atoms of period 3 and beyond can undergo sp3d2 hybridization, but atoms of period 2 cannot.

Which figure best illustrates the hybrid orbitals on carbon in benzene, C6H6?

In one sentence state the basic principle of valence bond theory.

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

What is the predicted O-C-O bond angle in CO₂?

According to molecular orbital theory, what is the bond order of the hypofluorite ion, OF^-?

Which figure best illustrates the hybrid orbitals on phosphorous in PH₃?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as ClF₂^-?

Indicate the type of hybrid orbitals used by the central atom in SF₆.

Which molecular formula corresponds to a structural formula with carbon atoms having hybridizations of sp, sp², and sp³?

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry, such as ClF₅?

How many electron domains are on the central atom for a sp² hybridized atom?

The hybridization of the central nitrogen atom in the molecule N₂O is

Allene, C₃H₄ (shown below), is one component of gas used for high-temperature welding. According to the valence bond model, which is a proper description of the bonding on the central carbon atom in allene?

The PCl₅ molecule has

The number of π bonds in phosgene, COCl₂, is

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry, such as SF₄?

The BrF₅ molecule has polar bonds and has a net dipole moment.

Consider the species N₂^-, N₂, and N₂⁺. Which of these species will be paramagnetic?

What is the molecular geometry of SiF₆^2- as predicted by the VSEPR model?

Atoms of period 3 and beyond can undergo sp³^d² hybridization, but atoms of period 2 cannot.

Which figure best illustrates the hybrid orbitals on carbon in benzene, C₆H₆?