Question 1

Predict the actual bond angles in SF3+ using the VSEPR theory.

Accepted Answer

A)  more than 120° 
B)  exactly 120° 
C)  between 109° and 120° 
D)  between 90° and 109° 
E)  less than 90° 
A)  more than 120° 
B)  exactly 120° 
C)  between 109° and 120° 
D)  between 90° and 109° 
E)  less than 90°

Question 2

In which one of the following species is the best Lewis structure a resonance structure?

Accepted Answer

A)  NH3 
B)  CO2 
C)  SF6 
D)  O2 
E)  CO32- 
A)  NH3 
B)  CO2 
C)  SF6 
D)  O2 
E)  CO32-

Question 3

In the hemoglobin molecule that carries oxygen molecules in blood, iron has 6 single bonds to surrounding atoms. What is the most likely geometry of these bonds to iron?

Accepted Answer

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

Question 4

Select the best Lewis structure for ClCN.

Accepted Answer

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

Question 5

What is the molecular shape of SiF62- as predicted by the VSEPR theory?

Accepted Answer

A)  trigonal bipyramidal 
B)  hexagonal 
C)  tetrahedral 
D)  see-saw 
E)  octahedral 
A)  trigonal bipyramidal 
B)  hexagonal 
C)  tetrahedral 
D)  see-saw 
E)  octahedral

Question 6

What is the molecular shape of NOCl as predicted by the VSEPR theory?

Accepted Answer

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

Question 7

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

Accepted Answer

A)  0 
B)  +1 
C)  -1 
D)  +2 
E)  -2 
A)  0 
B)  +1 
C)  -1 
D)  +2 
E)  -2

Question 8

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

Accepted Answer

A)  CO2 
B)  ClO3- 
C)  COCl2 
D)  NO2+ 
E)  HCN 
A)  CO2 
B)  ClO3- 
C)  COCl2 
D)  NO2+ 
E)  HCN

Question 9

List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX4.

Accepted Answer

A)  tetrahedral 
B)  see-saw 
C)  square planar 
D)  either tetrahedral or square planar 
E)  any of the above shapes 
A)  tetrahedral 
B)  see-saw 
C)  square planar 
D)  either tetrahedral or square planar 
E)  any of the above shapes

Question 10

In the nitrate ion (NO3-), nitrogen and oxygen are held together by

Accepted Answer

A)  ionic interactions. 
B)  covalent bonds. 
C)  dative bonds. 
D)  electronegativity. 
E)  network bonds. 
A)  ionic interactions. 
B)  covalent bonds. 
C)  dative bonds. 
D)  electronegativity. 
E)  network bonds.

Question 11

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

Accepted Answer

A)  square planar 
B)  tetrahedral 
C)  square pyramidal 
D)  see-saw 
E)  octahedral 
A)  square planar 
B)  tetrahedral 
C)  square pyramidal 
D)  see-saw 
E)  octahedral

Question 12

Select the best Lewis structure for P2I4.

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these choices are correct. 
A)    
B)    
C)    
D)    
E)  None of these choices are correct.

Question 13

The formal charges on Cl and O in the structure shown for the ClO- ion are, respectively

Accepted Answer

A)  0 and -1 
B)  -1 and 0 
C)  1 and -2 
D)  -2 and 1 
E)  None of these choices are correct. 
A)  0 and -1 
B)  -1 and 0 
C)  1 and -2 
D)  -2 and 1 
E)  None of these choices are correct.

Question 14

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2-.

Accepted Answer

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

Question 15

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

Accepted Answer

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

Question 16

Bond angles of 180° only occur around atoms which display linear molecular geometry.

Accepted Answer

A) True 
 B)False

Question 17

Select the Lewis structure for XeO2F2 that correctly minimizes formal charges.

Accepted Answer

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

Question 18

According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

Accepted Answer

A)  tetrahedral 
B)  square pyramidal 
C)  square planar 
D)  octahedral 
E)  see-saw 
A)  tetrahedral 
B)  square pyramidal 
C)  square planar 
D)  octahedral 
E)  see-saw

Question 19

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

Accepted Answer

A)  tetrahedral 
B)  trigonal bipyramidal 
C)  square pyramidal 
D)  octahedral 
E)  see-saw 
A)  tetrahedral 
B)  trigonal bipyramidal 
C)  square pyramidal 
D)  octahedral 
E)  see-saw

Question 20

How many electron pairs are shared between the carbon atoms in C2H4?

Accepted Answer

A)  5 
B)  4 
C)  3 
D)  2 
E)  1 
A)  5 
B)  4 
C)  3 
D)  2 
E)  1

Exam 10: The Shapes of Molecules

Predict the actual bond angles in SF3+ using the VSEPR theory.

In which one of the following species is the best Lewis structure a resonance structure?

In the hemoglobin molecule that carries oxygen molecules in blood, iron has 6 single bonds to surrounding atoms. What is the most likely geometry of these bonds to iron?

Select the best Lewis structure for ClCN.

What is the molecular shape of SiF62- as predicted by the VSEPR theory?

What is the molecular shape of NOCl as predicted by the VSEPR theory?

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX4.

In the nitrate ion (NO3-), nitrogen and oxygen are held together by

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

Select the best Lewis structure for P2I4.

The formal charges on Cl and O in the structure shown for the ClO- ion are, respectively

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2-.

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

Bond angles of 180° only occur around atoms which display linear molecular geometry.

Select the Lewis structure for XeO2F2 that correctly minimizes formal charges.

According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

How many electron pairs are shared between the carbon atoms in C2H4?

Keys to Studying Chemistry Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

Theories of Covalent Bonding

Intermolecular Forces Liquids, Solids, and Phase Changes

The Properties of Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Equilibrium the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Predict the actual bond angles in SF₃⁺ using the VSEPR theory.

What is the molecular shape of SiF₆^2- as predicted by the VSEPR theory?

In the COCl₂ molecule, carbon is the central atom. Based on the best Lewis structure for COCl₂, what is the formal charge on carbon?

List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX₄.

In the nitrate ion (NO₃^-), nitrogen and oxygen are held together by

What is the molecular shape of XeO₂F₂ as predicted by the VSEPR theory?

Select the best Lewis structure for P₂I₄.

The formal charges on Cl and O in the structure shown for the ClO^- ion are, respectively

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂^-.

What is the molecular shape of NH₂Cl as predicted by the VSEPR theory?

Select the Lewis structure for XeO₂F₂ that correctly minimizes formal charges.

According to VSEPR theory, a molecule with the general formula AX₄E₂ will have a _____ molecular shape.

According to VSEPR theory, a molecule with the general formula AX₅E will have a ______ molecular shape.

How many electron pairs are shared between the carbon atoms in C₂H₄?