Question 1

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) C) and E)
G) A) and E)

Question 2

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) C) and D)
G) A) and D)

Question 3

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

Question 4

According to VSEPR theory,a molecule with the general formula AX3E2 will have a _____ molecular shape.

Accepted Answer

A)  trigonal pyramidal
B)  trigonal bipyramidal
C)  trigonal planar
D)  T-shaped
E)  see-sawF) D) and E)
G) A) and E)

Question 5

Draw Lewis structures,showing all valence electrons,for the following species:
a.S2-
 b.CO
c.SO2
 d.CH3OH

Accepted Answer

Question 6

In the following Lewis structure for phosphate,phosphorus has a formal charge of ____ and an oxidation number of ____.

Accepted Answer

A)  0,-3
B)  0,5
C)  5,-3
D)  5,5
E)  3,5F) D) and E)
G) B) and D)

Question 7

In a Lewis structure for a molecule or ion,the sum of the formal charges on the atoms is equal to the charge on the molecule or ion.

Accepted Answer

A) True 
 B)False

Question 8

Which one of the following molecules does not have a dipole moment?

Accepted Answer

A)  CS2
B)  H2S
C)  CH2Cl2
D)  PH3
E)  CH2OF) C) and D)
G) B) and E)

Question 9

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

Question 10

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 pyramidalF) A) and D)
G) D) and E)

Question 11

In order for a non-cyclic triatomic molecule to be bent,VSEPR theory requires that there must be two lone pairs on the central atom.

Accepted Answer

A) True 
 B)False

Question 12

What is the molecular shape of ClF4- as predicted by the VSEPR theory?

Accepted Answer

A)  square pyramidal
B)  square planar
C)  see-saw
D)  octahedral
E)  tetrahedralF) C) and E)
G) A) and B)

Question 13

Predict the actual bond angles in BrF3 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°F) None of the above
G) A) and B)

Question 14

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)  HCNF) B) and C)
G) C) and D)

Question 15

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and D)
G) C) and D)

Question 16

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90°
B)  109°
C)  120°
D)  180°
E)  between 110 and 120°F) C) and E)
G) A) and C)

Question 17

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 situati...

Question 18

What is the molecular shape of BeH2 as predicted by the VSEPR theory?

Accepted Answer

A)  linear
B)  bent
C)  angular
D)  trigonal
E)  None of these choices is correct.F) B) and E)
G) A) and E)

Question 19

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory? 2F2 as predicted by the VSEPR theory?   A) square planar B) tetrahedral C) square pyramidal D) see-saw E) octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  square planar
B)  tetrahedral
C)  square pyramidal
D)  see-saw
E)  octahedralF) B) and E)
G) B) and D)

Question 20

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) A) and B)
G) C) and E)

Exam 10: The Shapes of Molecules

In the following Lewis structure for phosphate,phosphorus has a formal charge of ____ and an oxidation number of ____.

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According to VSEPR theory,a molecule with the general formula AX3E2 will have a _____ molecular shape.

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Which one of the following Lewis structures is definitely incorrect?

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Which one of the following molecules does not have a dipole moment?

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

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Which one of the following Lewis structures is definitely incorrect?

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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

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Predict the actual bond angles in BrF3 using the VSEPR theory.

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Draw Lewis structures,showing all valence electrons,for the following species: a.S2- b.CO c.SO2 d.CH3OH

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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 situati...View AnswerShow Answer

In order for a non-cyclic triatomic molecule to be bent,VSEPR theory requires that there must be two lone pairs on the central atom.

Correct AnswerverifiedShow Answer

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

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What is the molecular shape of ClF4- as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

Which one of the following Lewis structures is definitely incorrect?

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

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

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What is the molecular shape of BeH2 as predicted by the VSEPR theory?

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In a Lewis structure for a molecule or ion,the sum of the formal charges on the atoms is equal to the charge on the molecule or ion.

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Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

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In the following Lewis structure for phosphate,phosphorus has a formal charge of and an oxidation number of .

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According to VSEPR theory,a molecule with the general formula AX₃E₂ will have a _____ molecular shape.

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

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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

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Predict the actual bond angles in BrF₃ using the VSEPR theory.

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Draw Lewis structures,showing all valence electrons,for the following species: a.S^2- b.CO c.SO₂ d.CH₃OH

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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 situati...
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What is the molecular shape of ClF₄^- as predicted by the VSEPR theory?

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

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What is the molecular shape of BeH₂ as predicted by the VSEPR theory?

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Predict the ideal bond angles in AsCl₃ using the molecular shape given by the VSEPR theory.

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