Question 1

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

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¯F) B) and E)
G) B) and D)

Question 3

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 pyramidalF) None of the above
G) A) and B)

Question 4

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

Accepted Answer

Question 5

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.F) None of the above
G) A) and C)

Question 6

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 7

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)   bentF) C) and D)
G) All of the above

Question 8

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

Accepted Answer

A)   5
B)   4
C)   3
D)   2
E)   1F) A) and E)
G) C) and D)

Question 9

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

Accepted Answer

A)   N
B)   C
C)   O
D)   P
E)   AlF) A) and C)
G) A) and D)

Question 10

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)   octahedralF) All of the above
G) B) and D)

Question 11

Which of the following molecules has a net dipole moment?

Accepted Answer

A)   BeCl2
B)   SF2
C)   KrF2
D)   CO2
E)   CCl4F) All of the above
G) C) and D)

Question 12

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-sawF) C) and D)
G) A) and C)

Question 13

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" >F) B) and D)
G) B) and C)

Question 14

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¯F) A) and E)
G) A) and C)

Question 15

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)   triangularF) All of the above
G) A) and E)

Question 16

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)   CH2Cl2F) A) and C)
G) A) and E)

Question 17

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

Accepted Answer

A)   SO2
B)   HCl
C)   CS2
D)   CO
E)   Cl2OF) B) and E)
G) B) and C)

Question 18

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 pyramidalF) A) and B)
G) A) and D)

Question 19

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 20

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...

Exam 10: The Shapes of Molecules

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

Correct AnswerverifiedShow Answer

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

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

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Which one of the following Lewis structures is definitely incorrect?

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

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

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

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

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

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Which of the following molecules has a net dipole moment?

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

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

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

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

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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 AnswerverifiedThe Lewis structure is shown below. The ...View AnswerShow 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.)

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

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

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

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

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

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

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

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

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

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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.

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The concept is resonance. In this situat...
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What is the molecular shape of SCl₃F as predicted by the VSEPR theory?

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

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

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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.

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

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