Question 1

According to the VSEPR model,the molecular geometry of the carbonate ion,CO32-,is

Accepted Answer

A)  square planar.
B)  tetrahedral.
C)  pyramidal.
D)  trigonal planar.
E)  octahedral.

Question 2

How many π bonds are there in CH3COCH3?

Accepted Answer

Question 3

In the valence bond treatment,overlap of an s orbital on one atom with an sp3 orbital on another atom gives rise to a σ bond.

Accepted Answer

A) True 
 B)False

Question 4

Carbon uses ______ hybrid orbitals in ClCN.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2

Question 5

In one sentence state how molecular orbitals are usually obtained.

Accepted Answer

Molecular orbitals are obtaine...

Question 6

How do you describe the molecular geometry of a molecule that has more than one central atom?

Accepted Answer

A)  You describe the molecular geometry around the most electronegative atom.
B)  You describe the molecular geometry around each central atom separately.
C)  You describe the molecular geometry around the most electropositive atom.
D)  You describe the molecular geometry around the atom with the largest atomic radius.
E)  You describe the molecular geometry around the atom with the largest bond angle.

Question 7

According to the VSEPR model,which molecule is predicted to be linear?

Accepted Answer

A)  H2S
B)  HCN
C)  BF3
D)  H2CO
E)  SO3

Question 8

The nitrosonium ion,NO+,forms a number of interesting complexes with nickel,cobalt,and iron. According to molecular orbital theory,which statement about NO+ is correct?

Accepted Answer

A)  NO+ has a bond order of 2 and is paramagnetic.
B)  NO+ has a bond order of 2 and is diamagnetic.
C)  NO+ has a bond order of 3 and is paramagnetic.
D)  NO+ has a bond order of 3 and is diamagnetic.
E)  NO+ has a bond order of 2.5 and is neither paramagnetic nor diamagnetic.

Question 9

What does the abbreviation VSEPR stand for?

Accepted Answer

A)  Very Specific Electron and Proton Repair
B)  Variable Selective of Electron and Protons
C)  Valence Shell for Every Proton
D)  Very Selective Electron Pair theory
E)  Valence-Shell Electron-Pair Repulsion

Question 10

The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp2 hybrid orbital.

Accepted Answer

A) True 
 B)False

Question 11

What is the molecular geometry of SiF62- as predicted by the VSEPR model? 62- as predicted by the VSEPR model?   A) trigonal bipyramidal B) octahedral C) tetrahedral D) seesaw E) square pyramidal" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  trigonal bipyramidal
B)  octahedral
C)  tetrahedral
D)  seesaw
E)  square pyramidal

Question 12

For different structural arrangements of atoms having the formula XeF2Cl2,which structures represent polar molecules? (Black = Xe,Yellow = F,Green = Cl)  2Cl2,which structures represent polar molecules? (Black = Xe,Yellow = F,Green = Cl)    A) I and III B) II only C) I,II and III D) II and III E) None of these structures are polar." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I and III
B)  II only
C)  I,II and III
D)  II and III
E)  None of these structures are polar.

Question 13

According to valence bond theory,the triple bond in ethyne (acetylene,C2H2) consists of

Accepted Answer

A)  three σ bonds and no π bonds.
B)  two σ bonds and one π bond.
C)  one σ bond and two π bonds.
D)  no σ bonds and three π bonds.
E)  one σ bond,one π bond,and one bond intermediate between σ and π.

Question 14

According to the VSEPR model,which molecule has a predicted tetrahedral molecular geometry?

Accepted Answer

A)  XeF4
B)  BF3
C)  AsF5
D)  CF4
E)  NH3

Question 15

What is the hybridization of phosphorus in PCl3?

Accepted Answer

A)  sp3
B)  sp2
C)  sp
D)  sp3d
E)  sp3d2

Question 16

In the valence bond treatment,a π bond is formed when two p orbitals overlap side to side.

Accepted Answer

A) True 
 B)False

Question 17

A molecule with the formula AB3 and a trigonal planar molecular geometry uses _________ to form its σ bonds.

Accepted Answer

A)  sp hybrid orbitals
B)  sp2 hybrid orbitals
C)  sp3 hybrid orbitals
D)  sp3d hybrid orbitals
E)  sp3d2 hybrid orbitals

Question 18

When molecules that exhibit separation of charges are placed in an electric field,they become oriented positive end to negative plate and negative end to positive plate.

Accepted Answer

A) True 
 B)False

Question 19

For a homonuclear diatomic molecule,which molecular orbital is the highest in energy?

Accepted Answer

A)   
B)   
C)   
D)   
E)  All of these orbitals have the same energy.

Question 20

Which statement is not true of molecular orbitals?

Accepted Answer

A)  The number of molecular orbitals formed is always equal to the number of atomic orbitals combined.
B)  A molecular orbital can accommodate up to two electrons.
C)  When electrons are added to orbitals of the same energy,the most stable arrangement is predicted by Hund's rule.
D)  Low-energy molecular orbitals fill before high-energy molecular orbitals fill.
E)  Antibonding molecular orbitals are higher in energy than all of the bonding molecular orbitals.

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

According to valence bond theory,the triple bond in ethyne (acetylene,C2H2) consists of

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According to the VSEPR model,the molecular geometry of the carbonate ion,CO32-,is

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How many π bonds are there in CH3COCH3?

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The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp2 hybrid orbital.

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What is the molecular geometry of SiF62- as predicted by the VSEPR model?

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What is the hybridization of phosphorus in PCl3?

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For a homonuclear diatomic molecule,which molecular orbital is the highest in energy?

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How do you describe the molecular geometry of a molecule that has more than one central atom?

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According to the VSEPR model,which molecule is predicted to be linear?

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Carbon uses ______ hybrid orbitals in ClCN.

Correct AnswerverifiedShow Answer

Which statement is not true of molecular orbitals?

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When molecules that exhibit separation of charges are placed in an electric field,they become oriented positive end to negative plate and negative end to positive plate.

Correct AnswerverifiedShow Answer

For different structural arrangements of atoms having the formula XeF2Cl2,which structures represent polar molecules? (Black = Xe,Yellow = F,Green = Cl)

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In the valence bond treatment,a π bond is formed when two p orbitals overlap side to side.

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What does the abbreviation VSEPR stand for?

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In the valence bond treatment,overlap of an s orbital on one atom with an sp3 orbital on another atom gives rise to a σ bond.

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The nitrosonium ion,NO+,forms a number of interesting complexes with nickel,cobalt,and iron. According to molecular orbital theory,which statement about NO+ is correct?

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According to the VSEPR model,which molecule has a predicted tetrahedral molecular geometry?

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A molecule with the formula AB3 and a trigonal planar molecular geometry uses _________ to form its σ bonds.

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In one sentence state how molecular orbitals are usually obtained.

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According to valence bond theory,the triple bond in ethyne (acetylene,C₂H₂) consists of

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According to the VSEPR model,the molecular geometry of the carbonate ion,CO₃^2-,is

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How many π bonds are there in CH₃COCH₃?

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The bond angle for an sp hybrid orbital is smaller than the bond angle for an sp² hybrid orbital.

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What is the molecular geometry of SiF₆^2- as predicted by the VSEPR model?

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What is the hybridization of phosphorus in PCl₃?

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For different structural arrangements of atoms having the formula XeF₂Cl₂,which structures represent polar molecules? (Black = Xe,Yellow = F,Green = Cl)

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In the valence bond treatment,overlap of an s orbital on one atom with an sp³ orbital on another atom gives rise to a σ bond.

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The nitrosonium ion,NO⁺,forms a number of interesting complexes with nickel,cobalt,and iron. According to molecular orbital theory,which statement about NO⁺ is correct?

Correct Answer
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A molecule with the formula AB₃ and a trigonal planar molecular geometry uses _________ to form its σ bonds.

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Molecular orbitals are obtaine...
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