Question 1

Choose the best Lewis structure for NO3⁻.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 2

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

Accepted Answer

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

Question 3

The bond angle in H2O is

Accepted Answer

A)  107° 
B)  104.5° 
C)  120° 
D)  109.5° 
E)  95° 
A)  107° 
B)  104.5° 
C)  120° 
D)  109.5° 
E)  95°

Question 4

Determine the electron geometry (eg),molecular geometry (mg),and polarity of PCl3.

Accepted Answer

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

Question 5

Draw the best Lewis structure for Cl3⁻.What is the formal charge on the central Cl atom?

Accepted Answer

A)  -1 
B)  0 
C)  +1 
D)  +2 
E)  -2 
A)  -1 
B)  0 
C)  +1 
D)  +2 
E)  -2

Question 6

Place the following in order of decreasing bond length. H-F H-I H-Br

Accepted Answer

A)  H-F > H-Br > H-I 
B)  H-I > H-F > H-Br 
C)  H-I > H-Br > H-F 
D)  H-Br > H-F > H-I 
E)  H-F > H-I > H-Br 
A)  H-F > H-Br > H-I 
B)  H-I > H-F > H-Br 
C)  H-I > H-Br > H-F 
D)  H-Br > H-F > H-I 
E)  H-F > H-I > H-Br

Question 7

Place the following elements in order of increasing electronegativity. Li Fr P

Accepted Answer

A)  P < Li < Fr 
B)  Li < P < Fr 
C)  Fr < P < Li 
D)  Fr < Li < P 
E)  P < Fr < Li 
A)  P < Li < Fr 
B)  Li < P < Fr 
C)  Fr < P < Li 
D)  Fr < Li < P 
E)  P < Fr < Li

Question 8

Identify the compound with the smallest percent ionic character.

Accepted Answer

A)  HF 
B)  IBr 
C)  HCl 
D)  LiF 
A)  HF 
B)  IBr 
C)  HCl 
D)  LiF

Question 9

Identify the strongest bond.

Accepted Answer

A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same strength. 
A)  single covalent bond 
B)  double covalent bond 
C)  triple covalent bond 
D)  All of the above bonds are the same strength.

Question 10

Place the following in order of increasing bond length. C-F C-S C-Cl

Accepted Answer

A)  C-S < C-Cl < C-F 
B)  C-Cl < C-F < C-S 
C)  C-F < C-S < C-Cl 
D)  C-F < C-Cl < C-S 
E)  C-S < C-F < C-Cl 
A)  C-S < C-Cl < C-F 
B)  C-Cl < C-F < C-S 
C)  C-F < C-S < C-Cl 
D)  C-F < C-Cl < C-S 
E)  C-S < C-F < C-Cl

Question 11

Identify the compound with the smallest dipole moment in the gas phase.

Accepted Answer

A)  Cl2 
B)  ClF 
C)  HF 
D)  LiF 
A)  Cl2 
B)  ClF 
C)  HF 
D)  LiF

Question 12

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 13

Define bond energy.

Accepted Answer

Bond energy is the e

Question 14

Consider the molecule below.Determine the molecular geometry at each of the 3 labeled 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

How many lone pairs of electrons are on the Br atom in BrF4+?

Accepted Answer

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

Question 16

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 17

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined carbon in CH3CN.

Accepted Answer

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

Question 18

Identify the bond with the highest bond energy.

Accepted Answer

A)  Si = O 
B)  N = N 
C)  C = C 
D)  C = N 
E)  O = O 
A)  Si = O 
B)  N = N 
C)  C = C 
D)  C = N 
E)  O = O

Question 19

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

Accepted Answer

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

Question 20

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

Exam 6: Chemical Bonding I

Choose the best Lewis structure for NO3⁻.

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

The bond angle in H2O is

Determine the electron geometry (eg),molecular geometry (mg),and polarity of PCl3.

Draw the best Lewis structure for Cl3⁻.What is the formal charge on the central Cl atom?

Place the following in order of decreasing bond length. H-F H-I H-Br

Place the following elements in order of increasing electronegativity. Li Fr P

Identify the compound with the smallest percent ionic character.

Identify the strongest bond.

Place the following in order of increasing bond length. C-F C-S C-Cl

Identify the compound with the smallest dipole moment in the gas phase.

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

Define bond energy.

Consider the molecule below.Determine the molecular geometry at each of the 3 labeled atoms.

How many lone pairs of electrons are on the Br atom in BrF4+?

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

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined carbon in CH3CN.

Identify the bond with the highest bond energy.

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

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

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Choose the best Lewis structure for NO₃⁻.

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

The bond angle in H₂O is

Determine the electron geometry (eg),molecular geometry (mg),and polarity of PCl₃.

Draw the best Lewis structure for Cl₃⁻.What is the formal charge on the central Cl atom?

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

How many lone pairs of electrons are on the Br atom in BrF₄^+?

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined carbon in CH₃CN.

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