Question 1

Draw a molecular orbital diagram and use it to determine which of the following is paramagnetic.

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

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 
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 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

What are the F-Po-F bond angles in PoF6 ?

Accepted Answer

A)  60° 
B)  90° 
C)  109.5° 
D)  120° 
A)  60° 
B)  90° 
C)  109.5° 
D)  120°

Question 7

Determine the electron geometry (eg) and molecular geometry (mg) of CH3+.

Accepted Answer

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 
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 8

Give the approximate bond angle for a molecule with trigonal bipyramidal electron geometry and seesaw molecular geometry.

Accepted Answer

A)  <120° (equatorial), 90° (axial) 
B)  120° (equatorial), <90° (axial) 
C)  <90° (equatorial), <90° (axial) 
D)  120° (equatorial), 90° (axial) 
E)  <120° (equatorial), <90° (axial) 
A)  <120° (equatorial), 90° (axial) 
B)  120° (equatorial), <90° (axial) 
C)  <90° (equatorial), <90° (axial) 
D)  120° (equatorial), 90° (axial) 
E)  <120° (equatorial), <90° (axial)

Question 9

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

Accepted Answer

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

Question 10

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

Question 11

What is the O-B-O bond angle in BO33-?

Accepted Answer

A)  less than 109.5° 
B)  109.5° 
C)  120° 
D)  greater than 120° 
A)  less than 109.5° 
B)  109.5° 
C)  120° 
D)  greater than 120°

Question 12

Match the following.
-XeCl4

Accepted Answer

A) sp hybridized central atom 
B) octahedral electron geometry 
C) polar, but contains no polar bonds 
D) sp2 hybridized central atom 
E) linear
F)nonpolar, but contains a polar covalent bond
G)tetrahedral
H)trigonal planar
I)octahedral
J)polar
K)trigonal bipyramidal
L)seesaw molecular geometry 
A) sp hybridized central atom 
B) octahedral electron geometry 
C) polar, but contains no polar bonds 
D) sp2 hybridized central atom 
E) linear
F)nonpolar, but contains a polar covalent bond
G)tetrahedral
H)trigonal planar
I)octahedral
J)polar
K)trigonal bipyramidal
L)seesaw molecular geometry

Question 13

Draw the Lewis structure for BrF5. What is the hybridization on the Br atom?

Accepted Answer

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

Question 14

Consider the molecule below. Determine the molecular geometry at each of the three labelled atoms.

Accepted Answer

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 
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 15

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

Question 16

Using the VSEPR model, the electron-domain geometry of the central atom in AlCl3 is ________.

Accepted Answer

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

Question 17

In molecular orbital theory the acronym LUMO stands for ________.

Accepted Answer

A)  lowest unhybridized molecular orientation 
B)  lowest unoccupied molecular orbital 
C)  lowest unhybridized molecular orbital 
D)  linear-uninteresting molecular orientation 
E)  It has no meaning. 
A)  lowest unhybridized molecular orientation 
B)  lowest unoccupied molecular orbital 
C)  lowest unhybridized molecular orbital 
D)  linear-uninteresting molecular orientation 
E)  It has no meaning.

Question 18

Determine the molecular geometry for the molecule SBr2.

Accepted Answer

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

Question 19

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

Accepted Answer

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 
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

Draw a molecular orbital diagram and use it to determine which of the following is most stable.

Accepted Answer

A)  C22⁺ 
B)  N22⁺ 
C)  B2 
D)  C22⁻ 
E)  B22⁺ 
A)  C22⁺ 
B)  N22⁺ 
C)  B2 
D)  C22⁻ 
E)  B22⁺

Exam 10: Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Draw a molecular orbital diagram and use it to determine which of the following is paramagnetic.

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

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

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

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

What are the F-Po-F bond angles in PoF6 ?

Determine the electron geometry (eg) and molecular geometry (mg) of CH3+.

Give the approximate bond angle for a molecule with trigonal bipyramidal electron geometry and seesaw molecular geometry.

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

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

What is the O-B-O bond angle in BO33-?

Match the following. -XeCl4

Draw the Lewis structure for BrF5. What is the hybridization on the Br atom?

Consider the molecule below. Determine the molecular geometry at each of the three labelled atoms.

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

Using the VSEPR model, the electron-domain geometry of the central atom in AlCl3 is ________.

In molecular orbital theory the acronym LUMO stands for ________.

Determine the molecular geometry for the molecule SBr2.

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

Draw a molecular orbital diagram and use it to determine which of the following is most stable.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

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

What are the F-Po-F bond angles in PoF₆ ?

Determine the electron geometry (eg) and molecular geometry (mg) of CH₃⁺.

What is the O-B-O bond angle in BO₃^3-?

Match the following. -XeCl₄

Draw the Lewis structure for BrF₅. What is the hybridization on the Br atom?

Using the VSEPR model, the electron-domain geometry of the central atom in AlCl₃ is ________.

Determine the molecular geometry for the molecule SBr₂.

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