Deck 10: Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Question 1

If an oil tanker leaks oil in the ocean,where does the oil go?

A) The oil floats on the seawater; water is polar and oil is nonpolar.
B) The oil mixes with the water.
C) The oil sinks below the seawater; water is nonpolar and oil is polar.
D) The oil floats on the seawater; water is nonpolar and oil is polar.
E) The oil sinks below the seawater; water is polar and oil is nonpolar.

Answer 1

The oil floats on the seawater; water is polar and oil is nonpolar.

Question 2

Identify the number of electron groups around a molecule with sp hybridization.

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

Answer 2

2

Question 3

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

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

Answer 3

III > I > II

Question 4

Give the molecular geometry and number of electron groups for SF₄.

A) square planar, 6 electron groups
B) square pyramidal, 6 electron groups
C) T-shaped, 5 electron groups
D) octahedral, 6 electron groups
E) seesaw, 5 electron groups

Question 5

Soap works with water because

A) the polar head and the nonpolar tail attracts water.
B) the polar head attracts the grease and the nonpolar tail attracts water.
C) the polar head attracts water and the nonpolar tail attracts the grease.
D) the polar head and the nonpolar tail attracts the grease.

Question 6

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 7

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 8

A molecule with a T-shaped molecular geometry has a bond angle of

A) <120° for equatorial bonds and <90° for axial bonds.
B) 180°.
C) <90°.
D) 120° for equatorial bonds and 90° for axial bonds.
E) 120°.

Question 9

A molecule with a trigonal bipyramidal molecular geometry has a bond angle of

A) <120° for equatorial bonds and <90° for axial bonds.
B) 180°.
C) <90°.
D) 120° for equatorial bonds and 90° for axial bonds.
E) 120°.

Question 10

Give the molecular geometry and number of electron groups for BrF₅.

A) square planar, 6 electron groups
B) square pyramidal, 6 electron groups
C) T-shaped, 5 electron groups
D) octahedral, 6 electron groups
E) seesaw, 5 electron groups

Question 11

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 > CS₂ > SCl₂

Question 12

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 13

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

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

Question 14

A molecule with a seesaw molecular geometry has a bond angle of

A) <120° for equatorial bonds and <90° for axial bonds.
B) 180°.
C) <90°.
D) 120° for equatorial bonds and 90° for axial bonds.
E) 120°.

Question 15

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 16

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 17

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 18

Give the molecular geometry and number of electron groups for BrF₃.

A) square planar, 6 electron groups
B) square pyramidal, 6 electron groups
C) T-shaped, 5 electron groups
D) octahedral, 6 electron groups
E) seesaw, 5 electron groups

Question 19

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

Question 20

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

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

Question 21

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 22

Give the hybridization for the S in SF₆.

A) sp
B) sp²
C) sp³
D) sp³d
E) sp³d²

Question 23

A molecule,that is sp³d hybridized and has a molecular geometry of seesaw,has ________ bonding groups and ________ lone pairs around its central atom.

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

Question 24

A molecule,that is sp³d hybridized and has a molecular geometry of linear,has ________ bonding groups and ________ lone pairs around its central atom.

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

Question 25

A molecule,that is sp³d² hybridized and has a molecular geometry of square planar,has ________ bonding groups and ________ lone pairs around its central atom.

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

Question 26

Give the hybridization for the O in H₃O⁺.

A) sp
B) sp³
C) sp²
D) sp³d
E) sp³d²

Question 27

A molecule,that is sp³d² hybridized and has a molecular geometry of square pyramidal,has ________ bonding groups and ________ lone pairs around its central atom.

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

Question 28

Identify the number of electron groups around a molecule with sp² hybridization.

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

Question 29

Identify the number of electron groups around a molecule with sp³d hybridization.

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

Question 30

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 31

Identify the number of electron groups around a molecule with sp³d² hybridization.

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

Question 32

Give the hybridization for the Br in BrCl₃.

A) sp³d²
B) sp³d
C) sp³
D) sp²
E) sp

Question 33

Give the hybridization for the Br in BrO₄⁻.

A) sp
B) sp³d²
C) sp³d
D) sp³
E) sp²

Question 34

Give the hybridization for the Br in BrF₅.

A) sp³d²
B) sp³d
C) sp³
D) sp²
E) sp

Question 35

Give the hybridization for the O in OF₂.

A) sp
B) sp³
C) sp²
D) sp³d
E) sp³d²

Question 36

Give the hybridization for the S in SO₃.

A) sp
B) sp³
C) sp²
D) sp³d
E) sp³d²

Question 37

Give the hybridization for the C in HCCH.

A) sp³d²
B) sp³d
C) sp³
D) sp²
E) sp

Question 38

A molecule,that is sp³d hybridized and has a molecular geometry of T-shaped,has ________ bonding groups and ________ lone pairs around its central atom.

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

Question 39

Identify the number of electron groups around a molecule with sp³ hybridization.

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

Question 40

Give the hybridization for the C in HCN.

A) sp³d²
B) sp³d
C) sp³
D) sp²
E) sp

Question 41

Draw the molecular orbital diagram shown to determine which of the following is most stable.

A) C₂²⁺
B) N₂²⁺
C) B₂
D) C₂²⁻
E) B₂²⁺

Question 42

Give the number of sigma bonds and pi bonds for benzene,C₆H₆.

A) 3 sigma bonds, 6 pi bonds
B) 6 sigma bonds, 6 pi bonds
C) 6 sigma bonds, 3 pi bonds
D) 12 sigma bonds, 3 pi bonds
E) 15 sigma bonds, 3 pi bonds

Question 43

Draw the molecular orbital diagram shown to determine which of the following is paramagnetic.

A) O₂²⁻
B) Ne₂²⁺
C) O₂²⁺
D) F₂²⁺
E) None of the above is paramagnetic.

Question 44

Determine the electron geometry (eg)and molecular geometry (mg)of CF₃⁺¹.

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

Question 45

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

A) 109.5°
B) 180°
C) 120°
D) 107°
E) 45°

Question 46

Use the molecular orbital diagram shown to determine which of the following is most stable.

A) C₂²⁺
B) N₂²⁺
C) B₂
D) C₂²⁻
E) B₂²⁺

Question 47

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

A) 109.5°
B) 200°
C) 120°
D) 107°
E) 45°

Question 48

Determine the electron geometry (eg)and molecular geometry (mg)of SiBr₄.

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

Question 49

Determine the electron geometry (eg)and molecular geometry (mg)of BH₃.

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

Question 50

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

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

Question 51

Draw the molecular orbital diagram shown to determine which of the following is paramagnetic.

A) B₂²⁺
B) B₂²⁻
C) N₂²⁺
D) C₂²⁻
E) B₂

Question 52

Determine the electron geometry (eg)and molecular geometry (mg)of CO₃²⁻.

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

Question 53

Identify the hybridization for the carbons in benzene,C₆H₆.

A) sp³d²
B) sp³d
C) sp³
D) sp
E) sp²

Question 54

Use the molecular orbital diagram shown to determine which of the following is paramagnetic.

A) B₂²⁺
B) B₂²⁻
C) N₂²⁺
D) C₂²⁻
E) B₂

Question 55

Use the molecular orbital diagram shown to determine which of the following is paramagnetic.

A) O₂²⁻
B) Ne₂²⁺
C) O₂²⁺
D) F₂²⁺
E) None of the above is paramagnetic.

Question 56

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

A) trigonal bipyramidal
B) linear
C) trigonal
D) tetrahedral

Question 57

Draw the molecular orbital diagram shown to determine which of the following is most stable.

A) F₂
B) F₂²⁺
C) Ne₂²⁺
D) O₂²⁺
E) F₂²⁻

Question 58

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

A) 109.5°
B) 180°
C) 120°
D) 105°
E) 60°

Question 59

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

A) 109.5°
B) 60°
C) 145°
D) 107°
E) 90°

Question 60

Use the molecular orbital diagram shown to determine which of the following is most stable.

A) F₂
B) F₂²⁺
C) Ne₂²⁺
D) O₂²⁺
E) F₂²⁻

Question 61

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined carbon in CH₃F.

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

Question 62

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom CH₃OH.

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

Question 63

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

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

Question 64

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom H₂CO.

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

Question 65

Using the VSEPR model,the electron-domain geometry of the central atom in ICl₄^- is

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

Question 66

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

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

Question 67

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom CH₃OCH₃.

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

Question 68

What is the molecular geometry of SbF₅^2-?

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

Question 69

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

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 70

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 = bent
E) eg = tetrahedral, mg = trigonal planar

Question 71

The bond angle in H₂Se is

A) 107°.
B) <104.5°.
C) 109.5°.
D) 190°.
E) 145°.

Question 72

What is the molecular geometry of SeCl₄?

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

Question 73

Determine the electron geometry (eg)and molecular geometry (mg)of KrF₄.

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

Question 74

What is the molecular geometry of NCl₃?

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

Question 75

What is the molecular geometry of BrF₄ ^-?

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

Question 76

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

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

Question 77

Determine the electron geometry (eg)and molecular geometry (mg)of NCl₃.

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

Question 78

Using the VSEPR model,the molecular geometry of the central atom in SO₃ is

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

Question 79

Using the VSEPR model,the molecular geometry of the central atom in N₂O is

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

Question 80

The bond angle in NBr₃ is

A) 107°.
B) 104.5°.
C) 120°.
D) 60°.
E) 95°.