Question 1

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

Accepted Answer

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

Question 2

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)   NO2 2   
B)   BeCl2   
C)   CO32¯   
D)   CH4   
E)   SO2  " class="answers-bank-image d-inline" rel="preload" >
B)   BeCl2 2   
B)   BeCl2   
C)   CO32¯   
D)   CH4   
E)   SO2  " class="answers-bank-image d-inline" rel="preload" >
C)   CO32¯ 2   
B)   BeCl2   
C)   CO32¯   
D)   CH4   
E)   SO2  " class="answers-bank-image d-inline" rel="preload" >
D)   CH4 2   
B)   BeCl2   
C)   CO32¯   
D)   CH4   
E)   SO2  " class="answers-bank-image d-inline" rel="preload" >
E)   SO2 2   
B)   BeCl2   
C)   CO32¯   
D)   CH4   
E)   SO2  " class="answers-bank-image d-inline" rel="preload" >

Question 5

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¯

Question 6

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 7

Draw the Lewis structure of XeF4. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

Accepted Answer

The Lewis structure is shown below. The ...

Question 8

Which one of the following molecules has a zero dipole moment?

Accepted Answer

A)   SO2
B)   HCl
C)   CS2
D)   CO
E)   Cl2O

Question 9

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Accepted Answer

A)   PCl3
B)   BF3
C)   SO3
D)   BrF3
E)   CO32¯

Question 10

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

Question 11

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following atoms can expand its valence shell when bonding?

Accepted Answer

A)   N
B)   C
C)   O
D)   P
E)   Al

Question 13

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

Question 14

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)   BF4¯
B)   XeO3
C)   SiCl4
D)   NH3
E)   CH2Cl2

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

A)   4¯. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   4¯. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   4¯. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   4¯. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   4¯. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >

Question 17

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

Accepted Answer

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

Question 18

According to VSEPR theory, a molecule with the general formula AX6 will have a ______ molecular shape.

Accepted Answer

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

Question 19

Which of the following molecules has a net dipole moment?

Accepted Answer

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

Question 20

Draw all important resonance structures of the nitrate ion, NO3¯. .

Accepted Answer

Exam 10: The Shapes of Molecules

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

Correct AnswerverifiedShow Answer

Which of the following molecules has a net dipole moment?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Draw the Lewis structure of XeF4. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

Correct AnswerverifiedThe Lewis structure is shown below. The ...View AnswerShow Answer

Which of the following atoms can expand its valence shell when bonding?

Correct AnswerverifiedShow Answer

Draw all important resonance structures of the nitrate ion, NO3¯. .

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX6 will have a ______ molecular shape.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedThe concept is resonance. In this situat...View AnswerShow Answer

According to VSEPR theory, a molecule with the general formula AX2E3 will have a _____ molecular shape.

Correct AnswerverifiedShow Answer

Which one of the following molecules has a zero dipole moment?

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Which one of the following Lewis structures is definitely incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₂ will have a ___ molecular shape.

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

Correct Answer
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Draw the Lewis structure of XeF₄. Use this structure, in conjunction with VSEPR theory, to predict the shape of this molecule. Outline your reasoning.

Correct Answer
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The Lewis structure is shown below. The ...
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Draw all important resonance structures of the nitrate ion, NO₃^¯. .

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₆ will have a ______ molecular shape.

Correct Answer
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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.

Correct Answer
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The concept is resonance. In this situat...
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According to VSEPR theory, a molecule with the general formula AX₂E₃ will have a _____ molecular shape.

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

Correct Answer
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What is the molecular shape of SCl₃F as predicted by the VSEPR theory?

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

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