Question 1

Which is the most reasonable prediction for the H-N-H bond angle in NH3?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  107°
E)  105°F) C) and D)
G) B) and D)

Question 2

What is the hybridization on the central atom in NO3- ?

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) A) and C)
G) None of the above

Question 3

What is the molecular geometry of N2O as predicted by the VSEPR model? 2O as predicted by the VSEPR model?   A) trigonal pyramidal B) trigonal planar C) tetrahedral D) bent E) linear" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  trigonal pyramidal
B)  trigonal planar
C)  tetrahedral
D)  bent
E)  linearF) B) and D)
G) B) and E)

Question 4

Which is true concerning the dipole moment of a CO2 molecule?

Accepted Answer

A)  The dipole moment is zero because the C-O bond is nonpolar.
B)  The dipole moment is zero because the molecule is linear.
C)  The dipole moment is zero because the molecule is bent.
D)  The dipole moment is nonzero because the molecule is linear.
E)  The dipole moment is nonzero because the molecule is bent.F) A) and B)
G) A) and D)

Question 5

Rank the following molecules in order of increasing dipole moment.

Accepted Answer

A)  III 
B)  III 
C)  I 
D)  I 
E)  II < III < IF) A) and B)
G) All of the above

Question 6

What is the molecular geometry of the thiocyanate anion,SCN-,as predicted by the VSEPR model? (Carbon is the central atom.)

Accepted Answer

A)  linear
B)  bent
C)  tetrahedral
D)  trigonal planar
E)  trigonal pyramidalF) A) and C)
G) D) and E)

Question 7

Which one of the following molecules is polar?

Accepted Answer

A)  PBr5
B)  CCl4
C)  BrF5
D)  XeF2
E)  XeF4F) All of the above
G) A) and D)

Question 8

Valence bond theory predicts that sulfur will use _____ hybrid orbitals in sulfur dioxide,SO2 .

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) None of the above
G) B) and C)

Question 9

According to molecular orbital theory,what is the bond order in the O2- ion?

Accepted Answer

A)  5.5
B)  5
C)  4
D)  2.5
E)  1.5F) None of the above
G) C) and E) E

Question 10

Hyposulfite,SO22-,is a polyatomic ion that has not yet been definitively confirmed to exist.However,the VSEPR model may still be applied to yield a prediction on its molecular geometry.What is the most reasonable estimate for the O-S-O bond angle in hyposulfite?

Accepted Answer

A)  90°
B)  106°
C)  109.5°
D)  112°
E)  120°F) C) and D)
G) A) and B)

Question 11

What is the hybridization of the As atom in the AsF5 molecule?

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) A) and B)
G) A) and E)

Question 12

According to the VSEPR model,the predicted molecular geometry of the SO3 molecule is

Accepted Answer

A)  pyramidal.
B)  tetrahedral.
C)  trigonal planar.
D)  seesaw.
E)  square planar.F) C) and E)
G) A) and E)

Question 13

Water has ___________ (number)lone pair(s)of electrons on the central oxygen.

Accepted Answer

The answer of Water has ___________ (number)lone pair(s)of electrons on...

Question 14

Using the VSEPR model,predict the molecular geometry around the central atom in PO43-.

Accepted Answer

A)  trigonal planar
B)  trigonal pyramidal
C)  tetrahedral
D)  trigonal bipyramidal
E)  octahedralF) All of the above
G) B) and D)

Question 15

According to the VSEPR model,a molecule with the general formula AB5 with one lone pair on the central atom will have a ______ molecular geometry.

Accepted Answer

A)  tetrahedral
B)  trigonalbipyramidal
C)  square pyramidal
D)  octahedral
E)  seesawF) A) and E)
G) All of the above C

Question 16

Allene,C3H4 (shown below) ,is one component of gas used for high-temperature welding. According to the valence bond model,which is a proper description of the bonding on the central carbon atom in allene? 3H4 (shown below) ,is one component of gas used for high-temperature welding. According to the valence bond model,which is a proper description of the bonding on the central carbon atom in allene?   A) It shares four π bonds,two with each carbon atom on either side. B) It shares four σ bonds,two with each carbon atom on either side. C) It shares one σ bond and one π bond with each carbon atom on either side. D) It shares two σ bonds with the carbon atom on the left,and two π bonds with the carbon atom on the right. E) It shares two σ bonds with the carbon atom on the right,and two π bonds with the carbon atom on the left." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  It shares four π bonds,two with each carbon atom on either side.
B)  It shares four σ bonds,two with each carbon atom on either side.
C)  It shares one σ bond and one π bond with each carbon atom on either side.
D)  It shares two σ bonds with the carbon atom on the left,and two π bonds with the carbon atom on the right.
E)  It shares two σ bonds with the carbon atom on the right,and two π bonds with the carbon atom on the left.F) A) and C)
G) B) and C)

Question 17

Thiocarbonyl disulfide (CSF2) ,based on the coordinate axes provided below,in which direction does the net molecular dipole moment point for the molecule? 2) ,based on the coordinate axes provided below,in which direction does the net molecular dipole moment point for the molecule?   A) It points in the +x direction. B) It points in the -x direction. C) It points in the +y direction. D) It points in the -y direction. E) The molecule does not have a net molecular dipole moment." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  It points in the +x direction.
B)  It points in the -x direction.
C)  It points in the +y direction.
D)  It points in the -y direction.
E)  The molecule does not have a net molecular dipole moment.F) All of the above
G) C) and D)

Question 18

What is the molecular geometry of ClF2- as predicted by the VSEPR model?

Accepted Answer

A)  linear
B)  bent
C)  seesaw
D)  T-shaped
E)  trigonal bipyramidalF) A) and B)
G) A) and E)

Question 19

Which formula is incorrectly matched with its VSEPR model representation? (Note: Lone pairs on the models,if any,are not shown.)

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and C)
G) C) and D) A

Question 20

The BrF5 molecule has polar bonds and has a net dipole moment.

Accepted Answer

A) True 
 B)False

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

Which is the most reasonable prediction for the H-N-H bond angle in NH3?

Correct AnswerverifiedShow Answer

What is the hybridization on the central atom in NO3- ?

Correct AnswerverifiedShow Answer

What is the molecular geometry of N2O as predicted by the VSEPR model?

Correct AnswerverifiedShow Answer

Which is true concerning the dipole moment of a CO2 molecule?

Correct AnswerverifiedShow Answer

Rank the following molecules in order of increasing dipole moment.

Correct AnswerverifiedShow Answer

What is the molecular geometry of the thiocyanate anion,SCN-,as predicted by the VSEPR model? (Carbon is the central atom.)

Correct AnswerverifiedShow Answer

Which one of the following molecules is polar?

Correct AnswerverifiedShow Answer

Valence bond theory predicts that sulfur will use _____ hybrid orbitals in sulfur dioxide,SO2 .

Correct AnswerverifiedShow Answer

According to molecular orbital theory,what is the bond order in the O2- ion?

Correct AnswerverifiedE

Hyposulfite,SO22-,is a polyatomic ion that has not yet been definitively confirmed to exist.However,the VSEPR model may still be applied to yield a prediction on its molecular geometry.What is the most reasonable estimate for the O-S-O bond angle in hyposulfite?

Correct AnswerverifiedShow Answer

What is the hybridization of the As atom in the AsF5 molecule?

Correct AnswerverifiedShow Answer

According to the VSEPR model,the predicted molecular geometry of the SO3 molecule is

Correct AnswerverifiedShow Answer

Water has ___________ (number)lone pair(s)of electrons on the central oxygen.

Correct AnswerverifiedShow Answer

Using the VSEPR model,predict the molecular geometry around the central atom in PO43-.

Correct AnswerverifiedShow Answer

According to the VSEPR model,a molecule with the general formula AB5 with one lone pair on the central atom will have a ______ molecular geometry.

Correct AnswerverifiedC

Allene,C3H4 (shown below) ,is one component of gas used for high-temperature welding. According to the valence bond model,which is a proper description of the bonding on the central carbon atom in allene?

Correct AnswerverifiedShow Answer

Thiocarbonyl disulfide (CSF2) ,based on the coordinate axes provided below,in which direction does the net molecular dipole moment point for the molecule?

Correct AnswerverifiedShow Answer

What is the molecular geometry of ClF2- as predicted by the VSEPR model?

Correct AnswerverifiedShow Answer

Which formula is incorrectly matched with its VSEPR model representation? (Note: Lone pairs on the models,if any,are not shown.)

Correct AnswerverifiedA

The BrF5 molecule has polar bonds and has a net dipole moment.

Correct AnswerverifiedShow Answer

Which is the most reasonable prediction for the H-N-H bond angle in NH₃?

Correct Answer
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What is the hybridization on the central atom in NO₃^- ?

Correct Answer
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What is the molecular geometry of N₂O as predicted by the VSEPR model?

Correct Answer
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Which is true concerning the dipole moment of a CO₂ molecule?

Correct Answer
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Correct Answer
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What is the molecular geometry of the thiocyanate anion,SCN^-,as predicted by the VSEPR model? (Carbon is the central atom.)

Correct Answer
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Correct Answer
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Valence bond theory predicts that sulfur will use _____ hybrid orbitals in sulfur dioxide,SO₂ .

Correct Answer
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According to molecular orbital theory,what is the bond order in the O₂^- ion?

Correct Answer
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E

Hyposulfite,SO₂^2-,is a polyatomic ion that has not yet been definitively confirmed to exist.However,the VSEPR model may still be applied to yield a prediction on its molecular geometry.What is the most reasonable estimate for the O-S-O bond angle in hyposulfite?

Correct Answer
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What is the hybridization of the As atom in the AsF₅ molecule?

Correct Answer
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According to the VSEPR model,the predicted molecular geometry of the SO₃ molecule is

Correct Answer
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Correct Answer
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Using the VSEPR model,predict the molecular geometry around the central atom in PO₄^3-.

Correct Answer
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According to the VSEPR model,a molecule with the general formula AB₅ with one lone pair on the central atom will have a ______ molecular geometry.

Correct Answer
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C

Allene,C₃H₄ (shown below) ,is one component of gas used for high-temperature welding. According to the valence bond model,which is a proper description of the bonding on the central carbon atom in allene?

Correct Answer
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Thiocarbonyl disulfide (CSF₂) ,based on the coordinate axes provided below,in which direction does the net molecular dipole moment point for the molecule?

Correct Answer
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What is the molecular geometry of ClF₂^- as predicted by the VSEPR model?

Correct Answer
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Correct Answer
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A

The BrF₅ molecule has polar bonds and has a net dipole moment.

Correct Answer
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