Deck 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

Question 1

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

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

Answer 1

trigonal planar.

Question 2

What is the predicted molecular geometry of the IBr₃ molecule according to the VSEPR model?

A)tetrahedral
B)T-shaped
C)bent
D)trigonal planar
E)seesaw

Answer 2

T-shaped

Question 3

According to the VSEPR model,the predicted molecular geometry of SiCl₄ is

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

Answer 3

tetrahedral.

Question 4

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

A)H₂S
B)HCN
C)BF₃
D)H₂CO
E)SO₃

Question 5

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

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

Question 6

Which of the following is required for the determination of the VSEPR model and the molecular shape?

A)Atomic mass
B)Number of protons
C)Oxidation number
D)Lewis structure
E)None of the answers is correct.

Question 7

What is the total number of electron domains around the central atom for a molecule having a square pyramidal molecular geometry,such as ClF₅?

A)5
B)2
C)3
D)4
E)6

Question 8

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

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

Question 9

According to the VSEPR model,which molecule is predicted to have a molecular geometry that is trigonal bipyramidal?

A)SF₄
B)XeF₄
C)NF₃
D)SF₆
E)PF₅

Question 10

What does the abbreviation VSEPR stand for?

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 11

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry,such as XeBr₄?

A)2
B)3
C)4
D)5
E)6

Question 12

What is the predicted molecular geometry of the H₂O molecule according to the VSEPR model?

A)tetrahedral
B)trigonal pyramidal
C)bent
D)square planar
E)seesaw

Question 13

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

A)XeF₄
B)BF₃
C)AsF₅
D)CF₄
E)NH₃

Question 14

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

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

Question 15

Using the VSEPR model,predict the molecular geometry around the central atom in SO₃^2-.

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

Question 16

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

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

Question 17

What is the total number of electron domains around the central atom for a molecule having a T-shaped molecular geometry,such as BrF₃?

A)5
B)2
C)3
D)4
E)6

Question 18

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry,such as SF₄?

A)1
B)2
C)3
D)4
E)6

Question 19

What is the total number of electron domains around the central atom for a molecule having a trigonal pyramidal molecular geometry,such as NH₃?

A)5
B)2
C)3
D)4
E)6

Question 20

What is the predicted molecular geometry of the CH₄ molecule according to the VSEPR model?

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

Question 21

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry,such as ClF₂^-?

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

Question 22

What is the molecular geometry of BeH₂ as predicted by the VSEPR model?

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

Question 23

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

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

Question 24

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

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

Question 25

According to the VSEPR model,which one of the following molecules and ions will definitely have at least one 90° bond angle in it? (In each case,except water,the central atom is the first one in the formula.)

A)AlCl₄^-
B)NH₃
C)PCl₅
D)CO₂
E)H₂O

Question 26

According to the VSEPR model,a molecule with the general formula AB₃ with no lone pairs on the central atom will have a ______ molecular shape.

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

Question 27

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.

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

Question 28

What is the number of lone electron pairs on the central atom of a molecule having a trigonal pyramidal molecular geometry,such as NH₃?

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

Question 29

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

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

Question 30

What is the molecular geometry of NO₂^- as predicted by the VSEPR model?

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

Question 31

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

A)linear
B)bent
C)seesaw
D)T-shaped
E)trigonal bipyramidal

Question 32

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.

A)tetrahedral
B)trigonalbipyramidal
C)square pyramidal
D)octahedral
E)seesaw

Question 33

According to the VSEPR model,what is the predicted Cl-C-Cl bond angle in CCl₄?

A)90°
B)109.5°
C)120°
D)145°
E)180°

Question 34

According to the VSEPR model,what is the predicted electron-domain geometry around the central iodine atom in the ion lF₂^- ?

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

Question 35

According to the VSEPR model,a molecule with the general formula AB₂ with two lone pairs on the central atom will have a _____ molecular geometry.

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

Question 36

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

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

Question 37

What is the molecular geometry of XeO₂F₂ as predicted by the VSEPR model?

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

Question 38

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry,such as CO₂?

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

Question 39

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

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

Question 40

What is the molecular geometry of ClO₃F as predicted by the VSEPR model?

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

Question 41

Which is the most reasonable prediction for the H-O-H bond angle in H₂O?

A)90°
B)109.5°
C)120°
D)107°
E)105°

Question 42

What is the predicted O-C-O bond angle in CO₂?

A)60°
B)90°
C)109.5°
D)120°
E)180°

Question 43

Which one of the following molecules is polar?

A)PBr₅
B)CCl₄
C)BrF₅
D)XeF₂
E)XeF₄

Question 44

Predict the molecular geometry and polarity of the SO₂ molecule.

A)linear,polar
B)linear,nonpolar
C)bent,polar
D)bent,nonpolar
E)trigonal planar,polar

Question 45

Which one of the following molecules is polar?

A)CH₄
B)CHBr₃
C)F₂
D)CBr₄
E)CO₂

Question 46

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

A)90°
B)109.5°
C)120°
D)107°
E)105°

Question 47

Which is the most reasonable prediction for the Cl-N-Cl bond angle in NCl₃?

A)120°
B)111°
C)109.5°
D)107°
E)90°

Question 48

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

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 49

Indicate the type of hybrid orbitals used by the central atom in PCl₃.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 50

Indicate the type of hybrid orbitals used by the central atom in CCl₄.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 51

Which one of the following molecules is nonpolar?

A)CO₂
B)PF₃
C)KCl
D)IBr₃
E)CHCl₃

Question 52

Which of the following molecules has a nonzero dipole moment?

A)BeCl₂
B)SF₂
C)KrF₂
D)CO₂
E)CCl₄

Question 53

Predict the molecular geometry and polarity of the CS₂ molecule.

A)linear,polar
B)linear,nonpolar
C)tetrahedral,nonpolar
D)bent,nonpolar
E)bent,polar

Question 54

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

A)CO
B)CH₂Cl₂
C)SO₃
D)SO₂
E)NH₃

Question 55

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

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°

Question 56

The PCl₅ molecule has

A)nonpolar bonds,and is a nonpolar molecule.
B)nonpolar bonds,but is a polar molecule.
C)polar bonds,and is a polar molecule.
D)polar bonds,but is a nonpolar molecule.

Question 57

Indicate the type of hybrid orbitals used by the central atom in SF₆.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 58

Which has a dipole moment of zero?

A)N₂O
B)NF₃
C)H₂S
D)SeO₃
E)CH₃Cl

Question 59

Which one of the following molecules is nonpolar?

A)NH₃
B)OF₂
C)CH₃Cl
D)H₂O
E)BeCl₂

Question 60

Which is the most reasonable prediction for the H-C-H bond angle in CH₄?

A)90°
B)109.5°
C)120°
D)107°
E)105°

Question 61

What is the hybridization of the central atom in ClO₃^-?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 62

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

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

Question 63

Which statement about orbital hybridization is incorrect?

A)The carbon atom in CH₄ is sp³ hybridized.
B)The carbon atom in CO₂ is sp hybridized.
C)The nitrogen atom in NH₃ is sp² hybridized.
D)sp² hybrid orbitals are coplanar,and at 120° to each other.
E)sp hybrid orbitals lie at 180° to each other.

Question 64

A molecule with the formula AB₄ and a square planar molecular geometry uses _________ to form its σ bonds.

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

Question 65

A molecule with the formula AB₄ and a tetrahedral molecular geometry uses _________ to form its σ bonds.

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

Question 66

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

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 67

The hybridization of the central nitrogen atom in the molecule N₂O is

A)sp.
B)sp².
C)sp³.
D)sp³d.
E)sp³d².

Question 68

How many π bonds are there in one molecule of 1,5-hexadiyne (shown below)?

A)2
B)4
C)6
D)11
E)15

Question 69

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

A)BeCl₂; sp²
B)SiH₄; sp³
C)BF₃; sp²
D)C₂H₂; sp
E)H₂O; sp³

Question 70

What is the hybridization of phosphorus in PCl₃?

A)sp³
B)sp²
C)sp
D)sp³d
E)sp³d²

Question 71

When PCl₅ solidifies it forms PCl₄⁺cations and PCl₆^- anions.According to valence bond theory,what hybrid orbitals are used by phosphorus in the PCl₄⁺cation?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 72

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion,CO₃^2-.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 73

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

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 74

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

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 75

What is the hybridization of As in the AsF₄^- ion?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 76

Carbon uses ______ hybrid orbitals in ClCN.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 77

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

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 78

Valence bond theory predicts that iodine will use _____ hybrid orbitals in ICl₂^-.

A)sp²
B)sp³
C)sp³d
D)sp³d²
E)None of these choices is correct.

Question 79

In which molecule is the central atom sp² hybridized?

A)SO₂
B)N₂O
C)BeCl₂
D)NF₃
E)PF₅

Question 80

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

A)1
B)2
C)3
D)5
E)9