Deck 10: Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Question 1

Determine the electron geometry (eg)and molecular geometry(mg)of BCl₃.

A)eg = trigonal planar,mg = trigonal planar
B)eg = tetrahedral,mg = trigonal planar
C)eg = tetrahedral,mg = trigonal pyramidal
D)eg = trigonal planar,mg = bent
E)eg = trigonal bipyramidal,mg = trigonal bipyramidal

Answer 1

eg = trigonal planar,mg = trigonal planar

Question 2

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.
CS₂ CF₄ SCl₂

A)CS₂ > SCl₂ > CF₄
B)SCl₂ > CF₄ > CS₂
C)CF₄ > CS₂ > SCl₂
D)CS₂ > CF₄ > SCl₂
E)CF₄ > SCl₂ > CS₂

Answer 2

CS₂ > CF₄ > SCl₂

Question 3

Determine the electron geometry (eg)and molecular geometry (mg)of BrF₃.

A)eg = trigonal planar,mg = trigonal planar
B)eg = trigonal bipyramidal,mg = T-shape
C)eg = trigonal planar,mg = bent
D)eg = trigonal bipyramidal,mg = see-saw
E)eg = tetrahedral,mg = trigonal pyramidal

Answer 3

eg = trigonal bipyramidal,mg = T-shape

Question 4

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule.
PF₃ OF₂ PF₄^⁺

A)PF₃ < OF₂ < PF₄^⁺
B)OF₂ < PF₃ < PF₄^⁺
C)OF₂ < PF₄^⁺ < PF₃
D)PF₄^⁺ < OF₂ < PF₃
E)PF₄^⁺ < PF₃ < OF₂

Question 5

Consider the molecule below.Determine the molecular geometry at each of the 2 labeled carbons.

A)C1 = tetrahedral,C2 = linear
B)C1 = trigonal planar,C2 = bent
C)C1 = bent,C2 = trigonal planar
D)C1 = trigonal planar,C2 = tetrahedral
E)C1 = trigonal pyramidal,C2 = see-saw

Question 6

Determine the electron geometry (eg)and molecular geometry (mg)of ICl₄^-1.

A)eg = tetrahedral,mg = tetrahedral
B)eg = linear,mg = linear
C)eg = tetrahedral,mg = bent
D)eg = trigonal bipyramidal,mg = tetrahedral
E)eg = octahedral,mg = square planar

Question 7

Determine the electron geometry (eg)and molecular geometry (mg)of PF₅.

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

Question 8

Determine the electron geometry (eg)and molecular geometry (mg)of ICl₂^⁻.

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

Question 9

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined carbon in CH₃CN.

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

Question 10

Determine the electron geometry (eg)and molecular geometry (mg)of CH₃¹⁺.

A)eg = tetrahedral,mg = tetrahedral
B)eg = tetrahedral,mg = trigonal pyramidal
C)eg = trigonal planar,mg = bent
D)eg = trigonal planar,mg = trigonal planar
E)eg = tetrahedral,mg = trigonal planar

Question 11

Give the approximate bond angle for a molecule with a tetrahedral shape.

A)109.5°
B)180°
C)120°
D)105°

Question 12

Determine the electron geometry (eg)and molecular geometry (mg)of CO₂.

A)eg = tetrahedral,mg = tetrahedral
B)eg = linear,mg = linear
C)eg = tetrahedral,mg = bent
D)eg = trigonal bipyramidal,mg = tetrahedral
E)eg = octahedral,mg = square planar

Question 13

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₂.

A)eg = trigonal bipyramidal,mg = bent
B)eg = linear,mg = linear
C)eg = tetrahedral,mg = linear
D)eg = trigonal bipyramidal,mg = linear
E)eg = tetrahedral,mg = bent

Question 14

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 NCl₃ NO₂^⁻

A)NCl₃ > NO₂⁻ > N₂O
B)NO₂⁻ > N₂O > NCl₃
C)N₂O > NO₂^⁻ > NCl₃
D)NCl₃ > N₂O > NO₂⁻
E)N₂O > NCl₃ > NO₂⁻

Question 15

Determine the electron geometry (eg)and molecular geometry (mg)of SiF₄.

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

Question 16

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₄.

A)eg = tetrahedral,mg = tetrahedral
B)eg = linear,mg = linear
C)eg = tetrahedral,mg = bent
D)eg = trigonal bipyramidal,mg = tetrahedral
E)eg = octahedral,mg = square planar

Question 17

Give the approximate bond angle for a molecule with a trigonal planar shape.

A)109.5°
B)180°
C)120°
D)105°

Question 18

Consider the molecule below.Determine the molecular geometry at each of the 3 labeled atoms.

A)1 = trigonal planar,2 = tetrahedral,3 = trigonal pyramidal
B)1 = tetrahedral,2 = tetrahedral,3 = tetrahedral
C)1 = trigonal planar,2 = tetrahedral,3 = tetrahedral
D)1 = tetrahedral,2 = tetrahedral,3 = trigonal planar
E)1 = trigonal planar,2 = trigonal pyramidal,3 = trigonal pyramidal

Question 19

Determine the electron geometry (eg)and molecular geometry (mg)of CO₃^2⁻.

A)eg = tetrahedral,mg = tetrahedral
B)eg = tetrahedral,mg = trigonal pyramidal
C)eg = trigonal planar,mg = bent
D)eg = trigonal planar,mg = trigonal planar
E)eg = tetrahedral,mg = trigonal planar

Question 20

Place the following in order of increasing X-Se-X bond angle,where X represents the outer atoms in each molecule.
SeO₂ SeCl₆ SeF₂

A)SeCl₆ < SeF₂ < SeO₂
B)SeF₂ < SeO₂ < SeCl₆
C)SeF₂ < SeCl₆ < SeO₂
D)SeO₂ < SeF₂ < SeCl₆
E)SeCl₆ < SeO₂ < SeF₂

Question 21

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

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

Question 22

How many of the following molecules are polar?
BrCl₃ CS₂ SiF₄ SO₃

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

Question 23

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₂.

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

Question 24

A molecule containing a central atom with sp³d hybridization has a(n)________ electron geometry.

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

Question 25

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule.
HCN H₂O H₃O^⁺

A)HCN < H₂O < H₃O^⁺
B)H₃O^⁺ < H₂O < HCN
C)HCN < H₃O^⁺ < H₂O
D)H₂O < HCN < H₃O^⁺
E)H₂O < H₃O^⁺ < HCN

Question 26

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

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 27

Determine the electron geometry,molecular geometry and polarity of TeCl₆.

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

Question 28

Place the following in order of increasing dipole moment.
I.BCl₃
II.BIF₂
III.BClF₂

A)I < II = III
B)II < III < I
C)I < II < III
D)II < I < III
E)I < III < II

Question 29

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

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

Question 30

How many of the following molecules are polar?
PCl₅ COS XeO₃ SeBr₂

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

Question 31

Determine the electron geometry,molecular geometry and polarity around the O of CH₃OH .

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

Question 32

Determine the electron geometry,molecular geometry and polarity of SF₆ .

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

Question 33

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₃.

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

Question 34

A molecule containing a central atom with sp³ hybridization has a(n)________ electron geometry.

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

Question 35

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

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 36

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

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

Question 37

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

A)GeH₂Br₂
B)SCl₂
C)AsCl₅
D)CF₂Cl₂
E)All of the above are nonpolar and contain a polar covalent bond.

Question 38

Determine the electron geometry,molecular geometry and polarity of HBrO₂ .

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

Question 39

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

A)HCN
B)CF₄
C)SeBr₄
D)ICl₃
E)Both B and C are nonpolar and contain a polar covalent bond.

Question 40

Place the following in order of decreasing dipole moment.
I.cis-CHCl=CHCl
II.trans-CHCl=CHCI
III.cis-CHF=CHF

A)III > I > II
B)II > I > III
C)I > III > II
D)II > III > I
E)I = III > II

Question 41

Draw the Lewis structure for the molecule CH₂CHCH₃.How many sigma and pi bonds does it contain?

A)8 sigma,1 pi
B)9 sigma,0 pi
C)9 sigma,1 pi
D)7 sigma,2 pi
E)8 sigma,2 pi

Question 42

Give the electron geometry,molecular geometry,and hybridization for CH₃^-.

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 43

How many of the following molecules have sp² hybridization on the central atom?
HCN SO₂ OCl₂ XeCl₂

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

Question 44

Draw the Lewis structure for SO₃.What is the hybridization on the S atom?

A)sp
B)sp³
C)sp²
D)sp³d
E)sp³d²

Question 45

How many of the following molecules have sp hybridization on the central atom?
C₂Cl₂ CO₂ O₃ H₂O

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

Question 46

Identify the shape that goes with sp³d.

A)trigonal bipyramidal
B)octahedral
C)tetrahedral
D)trigonal planar

Question 47

How many of the following molecules have sp³ hybridization on the central atom? XeCl₄ CH₄ SF₄ C₂H₂

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

Question 48

Draw the Lewis structure for SF₆.What is the hybridization on the S atom?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 49

How many of the following molecules have sp³d hybridization on the central atom?
SiCl₄ BrF₅ AsF₅ BrF₃

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

Question 50

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

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

Question 51

Draw the Lewis structure for OF₂.What is the hybridization on the O atom?

A)sp
B)sp³
C)sp²
D)sp³d
E)sp³d²

Question 52

A molecule containing a central atom with sp³d² hybridization has a(n)________ electron geometry.

A)octahedral
B)trigonal bipyramidal
C)tetrahedral
D)trigonal planar
E)trigonal pyramidal

Question 53

Consider the molecule below.Determine the hybridization at each of the 2 labeled carbons.

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

Question 54

Consider the molecule below.Determine the hybridization at each of the three atoms (C,C,N)from left to right

A)1 = sp²,2 = sp³,3 =s p²
B)1 = sp²,2 = sp³,3 = sp³
C)1 = sp³,2 = sp³,3 = sp³
D)1 = sp³,2 = sp³,3 = sp²
E)1 = sp,2 = sp²,3 = sp²

Question 55

Draw the Lewis structure for BrCl₃.What is the hybridization on the Br atom?

A)sp³d²
B)sp³d
C)sp³
D)sp²
E)sp

Question 56

Consider the following compound.How many sigma and pi bonds does it contain?
CH₃CHCHCO₂H

A)9 sigma,4 pi
B)11 sigma,2 pi
C)9 sigma,2 pi
D)13 sigma,0 pi
E)6 sigma,2 pi

Question 57

Draw the Lewis structure for BrO₄^⁻.What is the hybridization on the Br atom?

A)sp
B)sp³d²
C)sp³d
D)sp³
E)sp²

Question 58

Draw the Lewis structure for BrF₄^-.What is the hybridization on the Br atom?

A)sp³d²
B)sp³d
C)sp³
D)sp²
E)sp

Question 59

How many of the following molecules have sp³d² hybridization on the central atom?
SeCl₆ XeF₄ IF₅ AsCl₅

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

Question 60

From left to right,identify the hybridization on the carbons in CH₃CN.

A)1 = sp³,2 = sp³
B)1 = sp²,2 = sp²
C)1 = sp,2 = sp
D)1 = sp,2 = sp³
E)1 = sp³,2 = sp

Question 61

Match the following.
CH₂F₂

A)polar
B)s²p hybridized central atom
C)see-saw molecular geometry
D)sp hybridized central atom
E)nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds.

Question 62

Describe a square planar shape.

Question 63

Determine the hybridization about each carbon atom in the following structure.
CH₂CHCCCH₃

Question 64

Which of the following statements is true?

A)The total number of molecular orbitals formed doesn't always equal the number of atomic orbitals in the set.
B)A bond order of 0 represents a stable chemical bond.
C)When two atomic orbitals come together to form two molecular orbitals,one molecular orbital will be lower in energy than the two separate atomic orbitals,and one molecular orbital will be higher in energy than the separate atomic orbitals.
D)Electrons placed in antibonding orbitals stabilize the ion/molecule.
E)All of the above are true.

Question 65

Give the electron geometry,molecular geometry,and hybridization for both carbons in CH₃COOH.

Question 66

Match the following.
SF₄

A)polar
B)s²p hybridized central atom
C)see-saw molecular geometry
D)sp hybridized central atom
E)nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds.

Question 67

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

Question 68

Match the following.
BeF₂

A)polar
B)s²p hybridized central atom
C)see-saw molecular geometry
D)sp hybridized central atom
E)nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds.

Question 69

Match the following.
BCl₃

A)polar
B)s²p hybridized central atom
C)see-saw molecular geometry
D)sp hybridized central atom
E)nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds.

Question 70

Explain why oil and water do not mix.

Question 71

Draw the Lewis structure for the molecule C₃H₄.How many sigma and pi bonds does it contain?

A)7 sigma,1 pi
B)8 sigma,0 pi
C)6 sigma,2 pi
D)10 sigma,0 pi
E)8 sigma,2 pi

Question 72

What is the molecular geometry of NCl₃?

A)T-shaped
B)tetrahedral
C)trigonal planar
D)trigonal pyramidal

Question 73

Match the following.
XeCl₄

A)polar
B)s²p hybridized central atom
C)see-saw molecular geometry
D)sp hybridized central atom
E)nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds.

Question 74

What is the molecular geometry of ClF₄^-?

A)seesaw
B)square planar
C)square pyramidal
D)tetrahedral

Question 75

What geometric arrangement of charge clouds is expected for an atom that has four charge clouds?

A)trigonal bipyramidal
B)octahedral
C)tetrahedral
D)square planar

Question 76

Identify the molecular geometry in the carbons of the structure below.
CH₂CHCCCH₃

Question 77

What is the molecular geometry of SF₅^-?

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

Question 78

How many of the following molecules contain at least one pi bond?
C₂H₆ Cl₂CO C₂Cl₄ SeS₃

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

Question 79

Which of the following best describes ClF₂^-? It has a molecular geometry that is

A)linear with no lone pairs on the Cl atom.
B)linear with lone pairs on the Cl atom.
C)nonlinear with no lone pairs on the Cl atom.
D)nonlinear with lone pairs on the Cl atom.

Question 80

Is it possible for a molecule to be nonpolar even though it contains polar bonds? Explain your answer and give an example.