Question 1

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

Accepted Answer

A) C1 = sp3,C2 = sp3d 
B) C1 = sp,C2 = sp2 
C) C1 = sp2,C2 = sp3d 
D) C1 = sp3d,C2 = sp3d2 
E) C1 = sp2,C2 = sp3 
A) C1 = sp3,C2 = sp3d 
B) C1 = sp,C2 = sp2 
C) C1 = sp2,C2 = sp3d 
D) C1 = sp3d,C2 = sp3d2 
E) C1 = sp2,C2 = sp3 E

Question 2

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 $\quad$NCl3 $\quad$NO2-

Accepted Answer

A) NCl3 > NO2- > N2O 
B) NO2- > N2O > NCl3 
C) N2O > NO2- > NCl3 
D) NCl3 > N2O > NO2- 
E) N2O > NCl3 > NO2- 
A) NCl3 > NO2- > N2O 
B) NO2- > N2O > NCl3 
C) N2O > NO2- > NCl3 
D) NCl3 > N2O > NO2- 
E) N2O > NCl3 > NO2- C

Question 3

Draw the Lewis structure for H3O+.What is the hybridization on the O atom?

Accepted Answer

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

Question 4

How many of the following molecules are polar? 
XeO2 $\quad$SiCl2Br2 $\quad$C2Br2 $\quad$SeCl6

Accepted Answer

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

Question 5

Use molecular orbital theory to determine whether He22+ or He2+ is more stable.

Accepted Answer

The He₂²⁺ ion is more stable sinc

Question 6

Give the electron geometry (eg),molecular geometry (mg),and hybridization for CH3-.

Accepted Answer

A) eg = tetrahedral; mg = trigonal pyramidal; sp3 
B) eg = tetrahedral; mg = tetrahedral; sp3 
C) eg = trigonal pyramidal; mg = trigonal pyramidal; sp3 
D) eg = trigonal planar; mg = trigonal planar; sp2 
A) eg = tetrahedral; mg = trigonal pyramidal; sp3 
B) eg = tetrahedral; mg = tetrahedral; sp3 
C) eg = trigonal pyramidal; mg = trigonal pyramidal; sp3 
D) eg = trigonal planar; mg = trigonal planar; sp2

Question 7

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SF6.

Accepted Answer

A) eg = trigonal bipyramidal,mg = trigonal bipyramidal,nonpolar 
B) eg = tetrahedral,mg = tetrahedral,polar 
C) eg = trigonal bipyramidal,mg = seesaw,polar 
D) eg = octahedral,mg = trigonal bipyramidal,nonpolar 
E) eg = octahedral,mg = octahedral,nonpolar 
A) eg = trigonal bipyramidal,mg = trigonal bipyramidal,nonpolar 
B) eg = tetrahedral,mg = tetrahedral,polar 
C) eg = trigonal bipyramidal,mg = seesaw,polar 
D) eg = octahedral,mg = trigonal bipyramidal,nonpolar 
E) eg = octahedral,mg = octahedral,nonpolar

Question 8

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 9

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 10

Draw the Lewis structure for $\mathrm{SO}_{3}^{2-}$ .What is the hybridization on the S atom?

Accepted Answer

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

Question 11

List the number of sigma bonds and pi bonds in a triple bond.

Accepted Answer

A) 1 sigma,1 pi 
B) 2 sigma,1 pi 
C) 3 sigma,0 pi 
D) 1 sigma,2 pi 
A) 1 sigma,1 pi 
B) 2 sigma,1 pi 
C) 3 sigma,0 pi 
D) 1 sigma,2 pi

Question 12

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

Accepted Answer

A) 0.5 
B) 1 
C) 1.5 
D) 2 
E) 3 
A) 0.5 
B) 1 
C) 1.5 
D) 2 
E) 3

Question 13

Determine the electron geometry (eg),molecular geometry (mg),and polarity of XeO3.

Accepted Answer

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

Question 14

A molecule containing a central atom with sp2 hybridization has a ________ electron geometry.

Accepted Answer

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

Question 15

According to molecular orbital theory,what is an antibonding orbital?

Accepted Answer

An antibonding orbital is formed when tw

Question 16

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 17

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 18

Determine the electron geometry (eg),molecular geometry (mg),and polarity of N2O (N central).

Accepted Answer

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

Question 19

How many of the following molecules are polar? 
XeCl2 $\quad$COF2 $\quad$PCl4F $\quad$SF6

Accepted Answer

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

Question 20

Determine the molecular geometry for the molecule PF3.

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

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

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

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 \quad NCl3 \quad NO2-

Draw the Lewis structure for H3O+.What is the hybridization on the O atom?

How many of the following molecules are polar? XeO2 \quad SiCl2Br2 \quad C2Br2 \quad SeCl6

Use molecular orbital theory to determine whether He22+ or He2+ is more stable.

Give the electron geometry (eg),molecular geometry (mg),and hybridization for CH3-.

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SF6.

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

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

Draw the Lewis structure for SO32−\mathrm{SO}_{3}^{2-}SO32−​ .What is the hybridization on the S atom?

List the number of sigma bonds and pi bonds in a triple bond.

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

Determine the electron geometry (eg),molecular geometry (mg),and polarity of XeO3.

A molecule containing a central atom with sp2 hybridization has a ________ electron geometry.

According to molecular orbital theory,what is an antibonding orbital?

Determine the molecular geometry for the molecule BrF3.

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

Determine the electron geometry (eg),molecular geometry (mg),and polarity of N2O (N central).

How many of the following molecules are polar? XeCl2 \quad COF2 \quad PCl4F \quad SF6

Determine the molecular geometry for the molecule PF3.

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

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 $\quad$ NCl₃ $\quad$ NO₂^-

Draw the Lewis structure for H₃O⁺.What is the hybridization on the O atom?

How many of the following molecules are polar? XeO₂ $\quad$ SiCl₂Br₂ $\quad$ C₂Br₂ $\quad$ SeCl₆

Use molecular orbital theory to determine whether He₂²⁺ or He₂⁺ is more stable.

Give the electron geometry (eg),molecular geometry (mg),and hybridization for CH₃^-.

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SF₆.

Draw the Lewis structure for $\mathrm{SO}_{3}^{2-}$ .What is the hybridization on the S atom?

Determine the electron geometry (eg),molecular geometry (mg),and polarity of XeO₃.

A molecule containing a central atom with sp² hybridization has a ________ electron geometry.

Determine the molecular geometry for the molecule BrF₃.

Determine the electron geometry (eg),molecular geometry (mg),and polarity of N₂O (N central).

How many of the following molecules are polar? XeCl₂ $\quad$ COF₂ $\quad$ PCl₄F $\quad$ SF₆

Determine the molecular geometry for the molecule PF₃.