Question 1

What is the hybridization of the central iodine atom in I3-?

Accepted Answer

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

Question 2

The local molecular geometry and the hybridization around each carbon atom in benzene (C6H6 with a hexagonal ring structure) is _______

Accepted Answer

A)  square planar and sp. 
B)  trigonal planar and sp. 
C)  tetrahedral and sp3. 
D)  trigonal planar and sp2. 
E)  T-shaped and sp2. 
A)  square planar and sp. 
B)  trigonal planar and sp. 
C)  tetrahedral and sp3. 
D)  trigonal planar and sp2. 
E)  T-shaped and sp2.

Question 3

Use the relative energies of the molecular orbitals given below, which are derived from the n = 5 atomic orbitals, to determine the bond orders in I2 ,       , and    , and identify the species that is predicted to be the least stable. The valence molecular orbitals in order of increasing energy are F1F1F1S1F1F1F10F1F1F1S1F1F1F10< F1F1F1S1F1F1F10* < F1F1F1S1F1F1F10 < F1F1F1S1F1F1F10 < F1F1F1S1F1F1F10* <F1F1F1S1F1F1F10F1F1F1S1F1F1F10*.

Accepted Answer

The valence electron configuration of @#IMG-DLM&

Question 4

For the series methane, ammonia, and water, the bond angle increases in the following order: H2O 3 4. This trend is due to __________

Accepted Answer

A)  a decreasing effective nuclear charge. 
B)  a decrease in the number of lone pairs. 
C)  an increase in atomic radius. 
D)  an increase in the polarity of the molecules. 
E)  an increasing effective nuclear charge. 
A)  a decreasing effective nuclear charge. 
B)  a decrease in the number of lone pairs. 
C)  an increase in atomic radius. 
D)  an increase in the polarity of the molecules. 
E)  an increasing effective nuclear charge.

Question 5

Which of the following compounds is the most polar?

Accepted Answer

A)  NH3 
B)  PH3 
C)  AsH3 
D)  SbH3 
E)  BiH3 
A)  NH3 
B)  PH3 
C)  AsH3 
D)  SbH3 
E)  BiH3

Question 6

What are the hybridizations of the carbon atoms in CH3CH2COH, in order from left to right?

Accepted Answer

A)  sp3, sp3, sp2 
B)  sp3, sp3, sp3 
C)  sp3, sp2, sp3 
D)  sp2, sp2, sp3 
E)  sp3, sp2, sp2 
A)  sp3, sp3, sp2 
B)  sp3, sp3, sp3 
C)  sp3, sp2, sp3 
D)  sp2, sp2, sp3 
E)  sp3, sp2, sp2

Question 7

Identify the polar molecule.

Accepted Answer

A)  CF4 
B)  SiH4 
C)  CHCl3 
D)  CS2 
E)  CO2 
A)  CF4 
B)  SiH4 
C)  CHCl3 
D)  CS2 
E)  CO2

Question 8

Broccoli, cabbage, and kale contain compounds that break down in the human body to form isothiocyanates that may reduce the risk of certain types of cancer. Methyl isothiocyanate (CH3NCS) is the simplest member of this family of compounds. Use formal charge to identify the most stable Lewis structure for this compound. Based on this structure, predict the local molecular geometry and hybridization at each atom except hydrogen.

Accepted Answer

The structure with all formal charges eq

Question 9

All homonuclear diatomic molecules __________

Accepted Answer

A)  have polar bonds. 
B)  are polar. 
C)  are nonpolar. 
D)  cannot vibrate. 
E)  are liquids. 
A)  have polar bonds. 
B)  are polar. 
C)  are nonpolar. 
D)  cannot vibrate. 
E)  are liquids.

Question 10

Methyl thiocyanate (CH3SCN) is used as an agricultural pesticide and fumigant. Use formal charge to identify the most stable Lewis structure for this compound. Based on this structure, predict the local molecular geometry and hybridization at each atom except hydrogen.

Accepted Answer

The structure with all formal charges eq

Question 11

What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule?

Accepted Answer

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

Question 12

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below.

Accepted Answer

A)  Li2 
B)  C22- 
C)  N22- 
D)  N22+ 
E)  C2 
A)  Li2 
B)  C22- 
C)  N22- 
D)  N22+ 
E)  C2

Question 13

Ethanol has the formula CH3CH2OH. The oxygen atom has a _____ local molecular geometry and _____ hybridization.

Accepted Answer

A)  trigonal planar; sp 
B)  tetrahedral; sp3 
C)  tetrahedral; sp2 
D)  seesaw; sp2 
E)  bent; sp3 
A)  trigonal planar; sp 
B)  tetrahedral; sp3 
C)  tetrahedral; sp2 
D)  seesaw; sp2 
E)  bent; sp3

Question 14

Which one of the following statements regarding molecular orbital theory is correct?

Accepted Answer

A)  Two bonding orbitals and two antibonding orbitals are formed from one atomic orbital on each of two atoms. 
B)  p atomic orbitals cannot form F1F1F1S1F1F1F10 molecular orbitals. 
C)  A 2sF1F1F1S1F1F1F10 orbital has a higher energy than a 2sF1F1F1S1F1F1F10* orbital. 
D)  Only pi molecular orbitals can be formed from p atomic orbitals. 
E)  s atomic orbitals can only form sigma molecular orbitals. 
A)  Two bonding orbitals and two antibonding orbitals are formed from one atomic orbital on each of two atoms. 
B)  p atomic orbitals cannot form F1F1F1S1F1F1F10 molecular orbitals. 
C)  A 2sF1F1F1S1F1F1F10 orbital has a higher energy than a 2sF1F1F1S1F1F1F10* orbital. 
D)  Only pi molecular orbitals can be formed from p atomic orbitals. 
E)  s atomic orbitals can only form sigma molecular orbitals.

Question 15

Which type of molecular orbital has only one nodal plane, which contains the atomic nuclei?

Accepted Answer

A)  "F1F1F1S1F1F1F10" 
B)  "F1F1F1S1F1F1F10" 
C)  "F1F1F1S1F1F1F10*" 
D)  "F1F1F1S1F1F1F10*" 
E)  s 
A)  "F1F1F1S1F1F1F10" 
B)  "F1F1F1S1F1F1F10" 
C)  "F1F1F1S1F1F1F10*" 
D)  "F1F1F1S1F1F1F10*" 
E)  s

Question 16

Benzene (C6H6) is a cyclic, nonpolar molecule. By removing one of the hydrogens and replacing it with another atom or group, this substituted benzene becomes polar. Which of the following substituted benzenes is the most polar?

Accepted Answer

A)  C6H5F (fluorobenzene) 
B)  C6H5Br (bromobenzene) 
C)  C6H5Cl (chlorobenzene) 
D)  C6H5I (iodobenzene) 
E)  C6H5CH3 (methylbenzene) 
A)  C6H5F (fluorobenzene) 
B)  C6H5Br (bromobenzene) 
C)  C6H5Cl (chlorobenzene) 
D)  C6H5I (iodobenzene) 
E)  C6H5CH3 (methylbenzene)

Question 17

Which of the following molecules has a central atom that is sp3 hybridized?

Accepted Answer

A)  C2H2 
B)  H2CO 
C)  H2S 
D)  C2H4 
E)  C2H2Cl2 
A)  C2H2 
B)  H2CO 
C)  H2S 
D)  C2H4 
E)  C2H2Cl2

Question 18

Oxygen has two common molecular anions: peroxide (O22-) and superoxide (O2-). Use the MO energy level diagram below to identify which one of the following statements is not correct.

Accepted Answer

A)  The bond order of the peroxide is 1. 
B)  The superoxide has a shorter bond than the peroxide. 
C)  Like O2, the peroxide is paramagnetic. 
D)  The superoxide has a stronger bond than the peroxide. 
E)  Oxygen, O2, has a stronger bond than either of these oxides. 
A)  The bond order of the peroxide is 1. 
B)  The superoxide has a shorter bond than the peroxide. 
C)  Like O2, the peroxide is paramagnetic. 
D)  The superoxide has a stronger bond than the peroxide. 
E)  Oxygen, O2, has a stronger bond than either of these oxides.

Question 19

Ethanol has the formula CH3CH2OH. The end carbon atom has a _____ local molecular geometry and _____ hybridization.

Accepted Answer

A)  trigonal planar; sp 
B)  tetrahedral; sp3 
C)  tetrahedral; sp2 
D)  seesaw; sp2 
E)  seesaw; sp3 
A)  trigonal planar; sp 
B)  tetrahedral; sp3 
C)  tetrahedral; sp2 
D)  seesaw; sp2 
E)  seesaw; sp3

Question 20

Which of the following compounds has the smallest dipole moment?

Accepted Answer

A)  CF2Cl2 
B)  CF3Cl 
C)  CF4 
D)  CFCl3 
E)  CHFCl2 
A)  CF2Cl2 
B)  CF3Cl 
C)  CF4 
D)  CFCl3 
E)  CHFCl2

What is the hybridization of the central iodine atom in I₃^-?

The local molecular geometry and the hybridization around each carbon atom in benzene (C₆H₆ with a hexagonal ring structure) is _______

For the series methane, ammonia, and water, the bond angle increases in the following order: H₂O < NH₃ < CH₄. This trend is due to __________

Which of the following compounds is the most polar?

What are the hybridizations of the carbon atoms in CH₃CH₂COH, in order from left to right?

Identify the polar molecule.

All homonuclear diatomic molecules __________

Methyl thiocyanate (CH₃SCN) is used as an agricultural pesticide and fumigant. Use formal charge to identify the most stable Lewis structure for this compound. Based on this structure, predict the local molecular geometry and hybridization at each atom except hydrogen.

What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule?

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below.

Ethanol has the formula CH₃CH₂OH. The oxygen atom has a _ local molecular geometry and _ hybridization.

Which one of the following statements regarding molecular orbital theory is correct?

Which type of molecular orbital has only one nodal plane, which contains the atomic nuclei?

Benzene (C₆H₆) is a cyclic, nonpolar molecule. By removing one of the hydrogens and replacing it with another atom or group, this substituted benzene becomes polar. Which of the following substituted benzenes is the most polar?

Which of the following molecules has a central atom that is sp³ hybridized?

Oxygen has two common molecular anions: peroxide (O₂²^-) and superoxide (O₂^-). Use the MO energy level diagram below to identify which one of the following statements is not correct.

Ethanol has the formula CH₃CH₂OH. The end carbon atom has a _ local molecular geometry and _ hybridization.

Which of the following compounds has the smallest dipole moment?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Solution Chemistry and the Hydrosphere

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

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Exam 9: Molecular Geometry and Bonding Theories

What is the hybridization of the central iodine atom in I3-?

The local molecular geometry and the hybridization around each carbon atom in benzene (C6H6 with a hexagonal ring structure) is _______

For the series methane, ammonia, and water, the bond angle increases in the following order: H2O < NH3 < CH4. This trend is due to __________

Which of the following compounds is the most polar?

What are the hybridizations of the carbon atoms in CH3CH2COH, in order from left to right?

Identify the polar molecule.

All homonuclear diatomic molecules __________

Methyl thiocyanate (CH3SCN) is used as an agricultural pesticide and fumigant. Use formal charge to identify the most stable Lewis structure for this compound. Based on this structure, predict the local molecular geometry and hybridization at each atom except hydrogen.

What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule?

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below.

Ethanol has the formula CH3CH2OH. The oxygen atom has a _____ local molecular geometry and _____ hybridization.

Which one of the following statements regarding molecular orbital theory is correct?

Which type of molecular orbital has only one nodal plane, which contains the atomic nuclei?

Benzene (C6H6) is a cyclic, nonpolar molecule. By removing one of the hydrogens and replacing it with another atom or group, this substituted benzene becomes polar. Which of the following substituted benzenes is the most polar?

Which of the following molecules has a central atom that is sp3 hybridized?

Oxygen has two common molecular anions: peroxide (O22-) and superoxide (O2-). Use the MO energy level diagram below to identify which one of the following statements is not correct.

Ethanol has the formula CH3CH2OH. The end carbon atom has a _____ local molecular geometry and _____ hybridization.

Which of the following compounds has the smallest dipole moment?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Solution Chemistry and the Hydrosphere

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

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What is the hybridization of the central iodine atom in I₃^-?

The local molecular geometry and the hybridization around each carbon atom in benzene (C₆H₆ with a hexagonal ring structure) is _______

For the series methane, ammonia, and water, the bond angle increases in the following order: H₂O < NH₃ < CH₄. This trend is due to __________

What are the hybridizations of the carbon atoms in CH₃CH₂COH, in order from left to right?

Methyl thiocyanate (CH₃SCN) is used as an agricultural pesticide and fumigant. Use formal charge to identify the most stable Lewis structure for this compound. Based on this structure, predict the local molecular geometry and hybridization at each atom except hydrogen.

Ethanol has the formula CH₃CH₂OH. The oxygen atom has a _ local molecular geometry and _ hybridization.

Benzene (C₆H₆) is a cyclic, nonpolar molecule. By removing one of the hydrogens and replacing it with another atom or group, this substituted benzene becomes polar. Which of the following substituted benzenes is the most polar?

Which of the following molecules has a central atom that is sp³ hybridized?

Oxygen has two common molecular anions: peroxide (O₂²^-) and superoxide (O₂^-). Use the MO energy level diagram below to identify which one of the following statements is not correct.

Ethanol has the formula CH₃CH₂OH. The end carbon atom has a _ local molecular geometry and _ hybridization.