Question 1

Determine the electron geometry for the molecule PCl5.

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 2

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

Accepted Answer

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

Question 3

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 4

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 5

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

Accepted Answer

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 
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 6

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

Accepted Answer

A) GeH2Br2 
B) SCl2 
C) AsCl5 
D) CF2Cl2 
A) GeH2Br2 
B) SCl2 
C) AsCl5 
D) CF2Cl2

Question 7

A molecule or ion with two electrons in a bonding orbital and two electrons in an antibonding orbital would have a bond order of:

Accepted Answer

A) 0 
B) 1 
C) 1.5 
D) 0.5 
E) -1 
A) 0 
B) 1 
C) 1.5 
D) 0.5 
E) -1

Question 8

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

Accepted Answer

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 
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 9

Determine the electron geometry for the molecule SBr2.

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 10

Draw the Lewis structure for the molecule CH3CH2CCH.How many sigma and pi bonds does it contain?

Accepted Answer

A) 11 sigma,0 pi 
B) 9 sigma,1 pi 
C) 8 sigma,3 pi 
D) 9 sigma,2 pi 
E) 8 sigma,2 pi 
A) 11 sigma,0 pi 
B) 9 sigma,1 pi 
C) 8 sigma,3 pi 
D) 9 sigma,2 pi 
E) 8 sigma,2 pi

Question 11

Give the approximate bond angle for a molecule with trigonal planar electron geometry and bent molecular geometry.

Accepted Answer

A) <90° 
B) 90° 
C) <120° 
D) <109.5° 
E) 120° 
A) <90° 
B) 90° 
C) <120° 
D) <109.5° 
E) 120°

Question 12

Determine the molecular geometry for the molecule CS2.

Accepted Answer

A) Trigonal planar 
B) Bent 
C) Linear 
D) T-shaped 
E) Square planar 
A) Trigonal planar 
B) Bent 
C) Linear 
D) T-shaped 
E) Square planar

Question 13

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 14

The VSEPR model predicts the H-O-H bond angle in H3O+ to be

Accepted Answer

A) 60°. 
B) 90°. 
C) less than 109.5° but greater than 90°. 
D) 109.5°. 
A) 60°. 
B) 90°. 
C) less than 109.5° but greater than 90°. 
D) 109.5°.

Question 15

The hybrid orbital set used by the central atom in NF3 is ________.

Accepted Answer

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

Question 16

Determine the electron geometry for the molecule CS2.

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

Using the VSEPR model,the molecular geometry of the central atom in BF3 is ________.

Accepted Answer

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

Question 18

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

Accepted Answer

A) 180° 
B) 180° 
D) <109.5° 
E) <120° 
A) 180° 
B) 180° 
D) <109.5° 
E) <120°

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

Determine the electron geometry for the molecule PCl5.

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

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

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

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

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

A molecule or ion with two electrons in a bonding orbital and two electrons in an antibonding orbital would have a bond order of:

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

Determine the electron geometry for the molecule SBr2.

Draw the Lewis structure for the molecule CH3CH2CCH.How many sigma and pi bonds does it contain?

Give the approximate bond angle for a molecule with trigonal planar electron geometry and bent molecular geometry.

Determine the molecular geometry for the molecule CS2.

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

The VSEPR model predicts the H-O-H bond angle in H3O+ to be

The hybrid orbital set used by the central atom in NF3 is ________.

Determine the electron geometry for the molecule CS2.

Using the VSEPR model,the molecular geometry of the central atom in BF3 is ________.

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

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 for the molecule PCl₅.

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

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

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

Determine the electron geometry for the molecule SBr₂.

Draw the Lewis structure for the molecule CH₃CH₂CCH.How many sigma and pi bonds does it contain?

Determine the molecular geometry for the molecule CS₂.

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

The VSEPR model predicts the H-O-H bond angle in H₃O⁺ to be

The hybrid orbital set used by the central atom in NF₃ is ________.

Determine the electron geometry for the molecule CS₂.

Using the VSEPR model,the molecular geometry of the central atom in BF₃ is ________.