Question 1

Draw the Lewis structure for  SO32−\mathrm{SO}_{3}^{2-}SO32−​  .What is the hybridization on the S atom?

Accepted Answer

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

Question 2

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of N2O (N central) .

Accepted Answer

A)  eg = linear,mg = linear,nonpolar
B)  eg = tetrahedral,mg = linear,nonpolar
C)  eg = tetrahedral,mg = bent,polar
D)  eg = linear,mg = linear,polar
E)  eg = trigonal planar,mg = bent,polar

Question 3

According to molecular orbital theory,what is an antibonding orbital?

Accepted Answer

An antibonding orbital is formed when tw...

Question 4

A molecule containing a central atom with sp2 hybridization has a ________ electron geometry.

Accepted Answer

A)  linear
B)  trigonal bipyramidal
C)  trigonal planar
D)  tetrahedral
E)  bent

Question 5

Consider the molecule below.Determine the hybridization at each of the two labelled carbons. 3,C2 = sp3d B) C1 = sp,C2 = sp2 C) C1 = sp2,C2 = sp3d D) C1 = sp3d,C2 = sp3d2 E) C1 = sp2,C2 = sp3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  C1 = sp3,C2 = sp3d
B)  C1 = sp,C2 = sp2
C)  C1 = sp2,C2 = sp3d
D)  C1 = sp3d,C2 = sp3d2
E)  C1 = sp2,C2 = sp3 E

Question 6

A molecule or ion with four electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Accepted Answer

A)  1
B)  1.5
C)  2
D)  2.5
E)  3

Question 7

Determine the molecular geometry for the molecule PF3.

Accepted Answer

A)  Trigonal pyramidal
B)  Trigonal planar
C)  Tetrahedral
D)  T-shaped
E)  Bent

Question 8

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of XeO3.

Accepted Answer

A)  eg = trigonal planar,mg = trigonal planar,nonpolar
B)  eg = tetrahedral,mg = trigonal pyramidal,polar
C)  eg = trigonal planar,mg = trigonal pyramidal,polar
D)  eg = trigonal bipyramidal,mg = trigonal planar,nonpolar
E)  eg = octahedral,mg = tetrahedral,nonpolar

Question 9

How many of the following molecules are polar? 
XeO2  \quad SiCl2Br2  \quad C2Br2  \quad SeCl6

Accepted Answer

A)  1
B)  4
C)  2
D)  3
E)  0

Question 10

Determine the molecular geometry for the molecule BrF3.

Accepted Answer

A)  Square pyramidal
B)  Seesaw
C)  T-shaped
D)  Square planar
E)  Trigonal planar

Question 11

Use molecular orbital theory to determine whether He22+ or He2+ is more stable.

Accepted Answer

The He₂²⁺ ion is more stable sinc...

Question 12

Give the electron geometry (eg) ,molecular geometry (mg) ,and hybridization for CH3-.

Accepted Answer

A)  eg = tetrahedral; mg = trigonal pyramidal; sp3
B)  eg = tetrahedral; mg = tetrahedral; sp3
C)  eg = trigonal pyramidal; mg = trigonal pyramidal; sp3
D)  eg = trigonal planar; mg = trigonal planar; sp2

Question 13

List the number of sigma bonds and pi bonds in a triple bond.

Accepted Answer

A)  1 sigma,1 pi
B)  2 sigma,1 pi
C)  3 sigma,0 pi
D)  1 sigma,2 pi

Question 14

How many of the following molecules are polar? 
XeCl2  \quad COF2  \quad PCl4F  \quad SF6

Accepted Answer

A)  0
B)  3
C)  1
D)  2
E)  4

Question 15

A molecule or ion with five electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Accepted Answer

A)  0.5
B)  1
C)  1.5
D)  2
E)  3

Question 16

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. 
N2O  \quad NCl3  \quad NO2-

Accepted Answer

A)  NCl3 > NO2- > N2O
B)  NO2- > N2O > NCl3
C)  N2O > NO2- > NCl3
D)  NCl3 > N2O > NO2-
E)  N2O > NCl3 > NO2-  C

Question 17

Draw the Lewis structure for H3O+.What is the hybridization on the O atom?

Accepted Answer

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

Question 18

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SF6.

Accepted Answer

A)  eg = trigonal bipyramidal,mg = trigonal bipyramidal,nonpolar
B)  eg = tetrahedral,mg = tetrahedral,polar
C)  eg = trigonal bipyramidal,mg = seesaw,polar
D)  eg = octahedral,mg = trigonal bipyramidal,nonpolar
E)  eg = octahedral,mg = octahedral,nonpolar

Question 19

Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5

Question 20

Give the approximate bond angle for a molecule with an octahedral shape.

Accepted Answer

A)  109.5°
B)  180°
C)  120°
D)  105°
E)  90°

Exam 10: Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Draw the Lewis structure for SO32−\mathrm{SO}_{3}^{2-}SO32−​ .What is the hybridization on the S atom?

Correct AnswerverifiedShow Answer

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of N2O (N central) .

Correct AnswerverifiedShow Answer

According to molecular orbital theory,what is an antibonding orbital?

Correct AnswerverifiedAn antibonding orbital is formed when tw...View AnswerShow Answer

A molecule containing a central atom with sp2 hybridization has a ________ electron geometry.

Correct AnswerverifiedShow Answer

Consider the molecule below.Determine the hybridization at each of the two labelled carbons.

Correct AnswerverifiedE

A molecule or ion with four electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Correct AnswerverifiedShow Answer

Determine the molecular geometry for the molecule PF3.

Correct AnswerverifiedShow Answer

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of XeO3.

Correct AnswerverifiedShow Answer

How many of the following molecules are polar? XeO2 \quad SiCl2Br2 \quad C2Br2 \quad SeCl6

Correct AnswerverifiedShow Answer

Determine the molecular geometry for the molecule BrF3.

Correct AnswerverifiedShow Answer

Use molecular orbital theory to determine whether He22+ or He2+ is more stable.

Correct AnswerverifiedThe He22+ ion is more stable sinc...View AnswerShow Answer

Give the electron geometry (eg) ,molecular geometry (mg) ,and hybridization for CH3-.

Correct AnswerverifiedShow Answer

List the number of sigma bonds and pi bonds in a triple bond.

Correct AnswerverifiedShow Answer

How many of the following molecules are polar? XeCl2 \quad COF2 \quad PCl4F \quad SF6

Correct AnswerverifiedShow Answer

A molecule or ion with five electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Correct AnswerverifiedShow Answer

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N2O \quad NCl3 \quad NO2-

Correct AnswerverifiedC

Draw the Lewis structure for H3O+.What is the hybridization on the O atom?

Correct AnswerverifiedB

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SF6.

Correct AnswerverifiedShow Answer

Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.

Correct AnswerverifiedShow Answer

Give the approximate bond angle for a molecule with an octahedral shape.

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Draw the Lewis structure for $\mathrm{SO}_{3}^{2-}$ .What is the hybridization on the S atom?

Correct Answer
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Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of N₂O (N central) .

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An antibonding orbital is formed when tw...
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A molecule containing a central atom with sp² hybridization has a ________ electron geometry.

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E

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Determine the molecular geometry for the molecule PF₃.

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Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of XeO₃.

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How many of the following molecules are polar? XeO₂ $\quad$ SiCl₂Br₂ $\quad$ C₂Br₂ $\quad$ SeCl₆

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Determine the molecular geometry for the molecule BrF₃.

Correct Answer
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Use molecular orbital theory to determine whether He₂²⁺ or He₂⁺ is more stable.

Correct Answer
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The He₂²⁺ ion is more stable sinc...
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Give the electron geometry (eg) ,molecular geometry (mg) ,and hybridization for CH₃^-.

Correct Answer
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How many of the following molecules are polar? XeCl₂ $\quad$ COF₂ $\quad$ PCl₄F $\quad$ SF₆

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Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N₂O $\quad$ NCl₃ $\quad$ NO₂^-

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C

Draw the Lewis structure for H₃O⁺.What is the hybridization on the O atom?

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B

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SF₆.

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