Question 1

What is the bond order for the species O2−?

Accepted Answer

A)   1
B)   1.5
C)   2
D)   2.5
E)   None of these choices.F) B) and C)
G) C) and D)

Question 2

The number of lone pairs on the central atom is used to determine the ________.

Accepted Answer

The answer of The number of lone pairs on the...

Question 3

Which one of the following molecules is polar?

Accepted Answer

A)   PBr5
B)   CCl4
C)   BrF5
D)   XeF2
E)   XeF4F) C) and E)
G) A) and D)

Question 4

Which one of the following molecules is polar?

Accepted Answer

A)   CH4
B)   CHBr3
C)   F2
D)   CBr4
E)   CO2F) A) and B)
G) C) and E)

Question 5

According to the VSEPR model, the predicted molecular geometry of ammonia, NH3, is

Accepted Answer

A)   linear.
B)   trigonal planar.
C)   bent.
D)   tetrahedral.
E)   trigonal pyramidal.F) A) and B)
G) A) and C)

Question 6

Using the VSEPR model, what is the predicted molecular geometry of the PCl3 molecule?

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   trigonal pyramidal
E)   tetrahedralF) B) and D)
G) B) and C)

Question 7

Which figure best illustrates the hybrid orbitals on iodine in ICl2-?

Accepted Answer

A)   2-? 
A)     
B)     
C)     
D)     
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B)   2-? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   2-? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   2-? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   2-? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and E)
G) None of the above

Question 8

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

Accepted Answer

A)   CO
B)   CH2Cl2
C)   SO3
D)   SO2
E)   NH3F) C) and D)
G) B) and E)

Question 9

For a polyatomic ion having the general formula AB3n±, where A is an atom from Group 6A, B is an atom from Group 7A, and the ionic charge is n±, what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Accepted Answer

A)   3-
B)   1-
C)   1+
D)   3+
E)   5+F) A) and C)
G) B) and D)

Question 10

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

Accepted Answer

A)   three σ bonds and no 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > bonds.
B)   two σ bonds and one 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > bond.
C)   one σ bond and two 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > bonds.
D)   no σ bonds and three 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > bonds.
E)   one σ bond, one 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > bond, and one bond intermediate between σ and 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   one σ bond, one   bond, and one bond intermediate between σ and   ." class="answers-bank-image d-inline" rel="preload" > .F) All of the above
G) B) and D)

Question 11

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

Accepted Answer

A)   90°, 90°, and 180°
B)   86°, 94°, and 180°
C)   86°, 86°, and 172°
D)   94°, 94°, and 172°
E)   120°, 120°, and 120°F) B) and E)
G) A) and B)

Question 12

Which is the correct hybrid orbital diagram representing the hybridization of iodine in ICl5?

Accepted Answer

A)   5? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   5? 
A)     
B)     
C)     
D)     
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C)   5? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   5? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   5? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and D)
G) None of the above

Question 13

How many electron domains are on the central atom for a sp3d hybridized atom?

Accepted Answer

Question 14

According to molecular orbital theory, all diatomic molecules with an even number of electrons are diamagnetic.

Accepted Answer

A) True 
 B)False

Question 15

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

Question 16

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

Question 17

How many bonds are there in one molecule of acrylonitrile (shown below) ?

Accepted Answer

A)   1
B)   2
C)   3
D)   5
E)   9F) A) and B)
G) D) and E)

Question 18

In not more than two sentences, explain when and why chemists make use of the concept of hybridization.

Accepted Answer

Chemists postulate hybridizati...

Question 19

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

Question 20

According to the VSEPR model, a molecule with the general formula AB5 with no lone pairs on the central atom will have a ________ molecular geometry.

Accepted Answer

A)   tetrahedral
B)   trigonal planar
C)   trigonal pyramidal
D)   trigonal bipyramidal
E)   seesawF) B) and C)
G) D) and E)

Exam 9: Chemical Bonding II: Molecular Geometry and Bonding Theories

According to the VSEPR model, a molecule with the general formula AB5 with no lone pairs on the central atom will have a ________ molecular geometry.

Correct AnswerverifiedShow Answer

In not more than two sentences, explain when and why chemists make use of the concept of hybridization.

Correct AnswerverifiedChemists postulate hybridizati...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

Correct AnswerverifiedShow Answer

The number of lone pairs on the central atom is used to determine the ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Using the VSEPR model, what is the predicted molecular geometry of the PCl3 molecule?

Correct AnswerverifiedShow Answer

How many electron domains are on the central atom for a sp3d hybridized atom?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the bond order for the species O2−?

Correct AnswerverifiedShow Answer

Which one of the following molecules is polar?

Correct AnswerverifiedShow Answer

According to molecular orbital theory, all diatomic molecules with an even number of electrons are diamagnetic.

Correct AnswerverifiedShow Answer

Which figure best illustrates the hybrid orbitals on iodine in ICl2-?

Correct AnswerverifiedShow Answer

How many bonds are there in one molecule of acrylonitrile (shown below) ?

Correct AnswerverifiedShow Answer

Which is the correct hybrid orbital diagram representing the hybridization of iodine in ICl5?

Correct AnswerverifiedShow Answer

Which one of the following molecules is polar?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

For a polyatomic ion having the general formula AB3n±, where A is an atom from Group 6A, B is an atom from Group 7A, and the ionic charge is n±, what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Correct AnswerverifiedShow Answer

According to the VSEPR model, the predicted molecular geometry of ammonia, NH3, is

Correct AnswerverifiedShow Answer

According to the VSEPR model, a molecule with the general formula AB₅ with no lone pairs on the central atom will have a ________ molecular geometry.

Correct Answer
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Chemists postulate hybridizati...
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According to molecular orbital theory, what is the bond order in the O₂⁺ion?

Correct Answer
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Which is the most reasonable prediction for the three F-Br-F bond angles in BrF₃?

Correct Answer
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Correct Answer
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Correct Answer
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Using the VSEPR model, what is the predicted molecular geometry of the PCl₃ molecule?

Correct Answer
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How many electron domains are on the central atom for a sp³^d hybridized atom?

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

Correct Answer
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What is the bond order for the species O₂⁻?

Correct Answer
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Which figure best illustrates the hybrid orbitals on iodine in ICl₂^-?

Correct Answer
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Which is the correct hybrid orbital diagram representing the hybridization of iodine in ICl₅?

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

Correct Answer
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For a polyatomic ion having the general formula AB₃ⁿ^±, where A is an atom from Group 6A, B is an atom from Group 7A, and the ionic charge is n±, what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Correct Answer
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According to the VSEPR model, the predicted molecular geometry of ammonia, NH₃, is

Correct Answer
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