Question 1

Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

Accepted Answer

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

Question 2

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2-, carbon is the central atom) to illustrate.

Accepted Answer

The concept is resonance. In this situat

Question 3

Which of the following molecules has a net dipole moment?

Accepted Answer

A)  BeCl2 
B)  SF2 
C)  KrF2 
D)  CO2 
E)  CCl4 
A)  BeCl2 
B)  SF2 
C)  KrF2 
D)  CO2 
E)  CCl4

Question 4

According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

Accepted Answer

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

Question 5

All possible resonance structures contribute equally to the resonance hybrid.

Accepted Answer

A) True 
 B)False

Question 6

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 7

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

Accepted Answer

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

Question 8

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

Question 9

The Lewis structure of NO2 violates the octet rule.

Accepted Answer

A) True 
 B)False

Question 10

For the chlorate ion, ClO3-, draw two different valid Lewis structures, as follows:
a. a structure in which the octet rule is obeyed
b. a structure in which formal charges are minimized

Accepted Answer

A)11ec6d41_55eb_0544_9cd1_2df

Question 11

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 12

According to VSEPR theory, a molecule with the general formula AX3E will have a _____ molecular shape.

Accepted Answer

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

Question 13

What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

Accepted Answer

A)  linear 
B)  bent 
C)  angular 
D)  trigonal 
E)  none of the above 
A)  linear 
B)  bent 
C)  angular 
D)  trigonal 
E)  none of the above

Question 14

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

Accepted Answer

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

Question 15

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

Accepted Answer

A)  2 single, 4 double 
B)  4 single, 2 double 
C)  4 single, no double 
D)  6 single, no double 
E)  5 single, 1 double 
A)  2 single, 4 double 
B)  4 single, 2 double 
C)  4 single, no double 
D)  6 single, no double 
E)  5 single, 1 double

Question 16

How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid?

Accepted Answer

A)  4 and 4 
B)  5 and 5 
C)  5 and 6 
D)  6 and 5 
E)  6 and 8 
A)  4 and 4 
B)  5 and 5 
C)  5 and 6 
D)  6 and 5 
E)  6 and 8

Question 17

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 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

In which of the following does the nitrogen atom have a formal charge of -1?

Accepted Answer

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

Question 20

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Accepted Answer

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

Exam 10: The Shapes of Molecules

Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2-, carbon is the central atom) to illustrate.

Which of the following molecules has a net dipole moment?

According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

All possible resonance structures contribute equally to the resonance hybrid.

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

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

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

The Lewis structure of NO2 violates the octet rule.

For the chlorate ion, ClO3-, draw two different valid Lewis structures, as follows: a. a structure in which the octet rule is obeyed b. a structure in which formal charges are minimized

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 AX3E will have a _____ molecular shape.

What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid?

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

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

In which of the following does the nitrogen atom have a formal charge of -1?

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The 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: Bonding, Structure, and Reactivity

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Predict the ideal bond angles in GeCl₄using the molecular shape given by the VSEPR theory.

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO₂^-, carbon is the central atom) to illustrate.

According to VSEPR theory, a molecule with the general formula AX₂E will have a ______ molecular shape.

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

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO₄^-.

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

The Lewis structure of NO₂ violates the octet rule.

For the chlorate ion, ClO₃^-, draw two different valid Lewis structures, as follows: a. a structure in which the octet rule is obeyed b. a structure in which formal charges are minimized

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 AX₃E will have a _____ molecular shape.

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

According to VSEPR theory, a molecule with the general formula AX₄E₂will have a _____ molecular shape.