Question 1

Using the VSEPR model, the electron-domain geometry of the central atom in BF3 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 2

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

Accepted Answer

eg = tetrahedral; mg

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

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 
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 5

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

Accepted Answer

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

Question 6

A molecule or ion with four electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

Accepted Answer

A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) 3 
A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) 3

Question 7

The hybrid orbital set used by the central atom in NO3- is ________.

Accepted Answer

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

Question 8

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°

Question 9

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

Accepted Answer

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 
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 10

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

Accepted Answer

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

Question 11

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⁺

Accepted Answer

A) H3O+ 2O 
B) H3O⁺ 2O 3O⁺ 2O 
D)  H2O 3O⁺ 
E) H2O 3O⁺ < HCN 
A) H3O+ 2O 
B) H3O⁺ 2O 3O⁺ 2O 
D)  H2O 3O⁺ 
E) H2O 3O⁺ < HCN

Question 12

Use the molecular orbital diagram shown 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 13

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

Accepted Answer

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

Question 14

Determine the molecular geometry for the molecule BrF3.

Accepted Answer

A) Square pyramidal 
B) Seesaw 
C) T-shaped 
D) Square planar 
E) Trigonal planar 
A) Square pyramidal 
B) Seesaw 
C) T-shaped 
D) Square planar 
E) Trigonal planar

Question 15

In molecular orbital theory the acronym HOMO stands for

Accepted Answer

A) homogenous orbital-molecular orientation. 
B) highly ordered molecular orbital. 
C) highest occupied molecular orbital. 
D) highest orbital-molecular orientation. 
E) It has no meaning. 
A) homogenous orbital-molecular orientation. 
B) highly ordered molecular orbital. 
C) highest occupied molecular orbital. 
D) highest orbital-molecular orientation. 
E) It has no meaning.

Question 16

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

Accepted Answer

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

Question 17

Consider the molecule below. Determine the molecular geometry at each of the two labelled carbons.

Accepted Answer

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 = seesaw 
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 = seesaw

Question 18

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

Accepted Answer

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

Question 19

Draw the Lewis structure for N2H2. What is the hybridization on the N atoms?

Accepted Answer

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

Question 20

Determine the electron geometry (eg)and molecular geometry (mg)of CH3+1.

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

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

Using the VSEPR model, the electron-domain geometry of the central atom in BF3 is ________.

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

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

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

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

A molecule or ion with four electrons in bonding orbitals and two electrons in an antibonding orbital has a bond order of:

The hybrid orbital set used by the central atom in NO3- is ________.

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

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

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

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⁺

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

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

Determine the molecular geometry for the molecule BrF3.

In molecular orbital theory the acronym HOMO stands for

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

Consider the molecule below. Determine the molecular geometry at each of the two labelled carbons.

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

Draw the Lewis structure for N2H2. What is the hybridization on the N atoms?

Determine the electron geometry (eg)and molecular geometry (mg)of CH3+1.

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 Metallury

Transition Metals and Coordination Compounds

Filters

Using the VSEPR model, the electron-domain geometry of the central atom in BF₃ is ________.

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

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

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

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

The hybrid orbital set used by the central atom in NO₃^- is ________.

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

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

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⁺

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

Determine the molecular geometry for the molecule BrF₃.

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

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

Draw the Lewis structure for N₂H₂. What is the hybridization on the N atoms?

Determine the electron geometry (eg)and molecular geometry (mg)of CH₃⁺¹.