Question 1

In which one of the following species is the central atom (the first atom in the formula) likely to violate the octet rule?

Accepted Answer

A) BF 4 − 
B) XeO 3 
C) SiCl 4 
D) NH 3 
E) CH 2Cl 2 
A) BF 4 − 
B) XeO 3 
C) SiCl 4 
D) NH 3 
E) CH 2Cl 2

Question 2

According to VSEPR theory, a molecule with the general formula AX3 will have a __________ molecular shape.

Accepted Answer

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

Question 3

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 4

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 5

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

Accepted Answer

A) Trigonal pyramidal 
B) Trigonal 
C) Tetrahedral 
D) Linear 
E) Bent 
A) Trigonal pyramidal 
B) Trigonal 
C) Tetrahedral 
D) Linear 
E) Bent

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

According to VSEPR theory, a molecule with the general formula AX5 will have a __________ molecular shape.

Accepted Answer

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

Question 8

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 9

What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

Accepted Answer

A) linear 
B) Trigonal planar 
C) V-shaped 
D) Tetrahedral 
E) Trigonal pyramidal 
A) linear 
B) Trigonal planar 
C) V-shaped 
D) Tetrahedral 
E) Trigonal pyramidal

Question 10

According to VSEPR theory, a molecule with the general formula AX4 will have a __________ molecular shape.

Accepted Answer

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

Question 11

According to VSEPR theory, a molecule with the general formula AX2E2 will have a __________ molecular shape.

Accepted Answer

A) linear 
B) bent 
C) trigonal planar 
D) tetrahedral 
E) see-saw 
A) linear 
B) bent 
C) trigonal planar 
D) tetrahedral 
E) see-saw

Question 12

A molecule that contains polar bonds will always have a dipole moment.

Accepted Answer

A) True 
 B)False

Question 13

Predict the ideal bond angles in IF2− using the molecular shape given by the VSEPR theory.

Accepted Answer

A) 60° 
B) 90° 
C) 109° 
D) 120° 
E) 180° 
A) 60° 
B) 90° 
C) 109° 
D) 120° 
E) 180°

Question 14

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

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

Question 15

Which of the following elements would you expect most likely to be a central atom with an expanded valence shell?

Accepted Answer

A) Ne 
B) P 
C) N 
D) C 
E) B 
A) Ne 
B) P 
C) N 
D) C 
E) B

Question 16

Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present?

Accepted Answer

A) 120° only 
B) 90° only 
C) 180° only 
D) 60° and 90° only 
E) 90°, 120°, and 180° 
A) 120° only 
B) 90° only 
C) 180° only 
D) 60° and 90° only 
E) 90°, 120°, and 180°

Question 17

Oxygen difluoride is a powerful oxidizing and fluorinating agent. Select its Lewis structure.

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 18

What is the molecular shape of ClO3F as predicted by the VSEPR theory?

Accepted Answer

A) Trigonal pyramidal 
B) Square planar 
C) Square pyramidal 
D) Tetrahedral 
E) Octahedral 
A) Trigonal pyramidal 
B) Square planar 
C) Square pyramidal 
D) Tetrahedral 
E) Octahedral

Question 19

In which one of the following structures does the central atom have a formal charge of +2?

Accepted Answer

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

Question 20

According to VSEPR theory, a molecule with the general formula AX4E will have a __________ molecular shape.

Accepted Answer

A) bent 
B) see-saw 
C) trigonal planar 
D) T-shaped 
E) square planar 
A) bent 
B) see-saw 
C) trigonal planar 
D) T-shaped 
E) square planar

Exam 10: The Shapes of Molecules

In which one of the following species is the central atom (the first atom in the formula) likely to violate the octet rule?

According to VSEPR theory, a molecule with the general formula AX3 will have a __________ molecular shape.

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

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

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

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

According to VSEPR theory, a molecule with the general formula AX5 will have a __________ molecular shape.

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

What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

According to VSEPR theory, a molecule with the general formula AX4 will have a __________ molecular shape.

According to VSEPR theory, a molecule with the general formula AX2E2 will have a __________ molecular shape.

A molecule that contains polar bonds will always have a dipole moment.

Predict the ideal bond angles in IF2− using the molecular shape given by the VSEPR theory.

Which one of the following Lewis structures is definitely incorrect?

Which of the following elements would you expect most likely to be a central atom with an expanded valence shell?

Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present?

Oxygen difluoride is a powerful oxidizing and fluorinating agent. Select its Lewis structure.

What is the molecular shape of ClO3F as predicted by the VSEPR theory?

In which one of the following structures does the central atom have a formal charge of +2?

According to VSEPR theory, a molecule with the general formula AX4E will have a __________ molecular shape.

Keys to the Study of 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

According to VSEPR theory, a molecule with the general formula AX₃ will have a __________ molecular shape.

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

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

According to VSEPR theory, a molecule with the general formula AX₅ will have a __________ molecular shape.

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

What is the molecular symmetry around the carbons in CCl₂CH₂as predicted by the VSEPR theory?

According to VSEPR theory, a molecule with the general formula AX₄will have a __________ molecular shape.

According to VSEPR theory, a molecule with the general formula AX₂E₂will have a __________ molecular shape.

Predict the ideal bond angles in IF₂⁻ using the molecular shape given by the VSEPR theory.

What is the molecular shape of ClO₃F as predicted by the VSEPR theory?

According to VSEPR theory, a molecule with the general formula AX₄E will have a __________ molecular shape.