Question 1

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

Accepted Answer

An antibonding orbital is formed when 2 orbitals destructively interfere with one another.An antibonding orbital is usually higher in energy than the two separated atoms and has a node in the internuclear region.

Question 2

Match the following.
-BeF2

Accepted Answer

A) polar 
B) s2p hybridized central atom 
C) see-saw molecular geometry 
D) sp hybridized central atom 
E) nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds. 
A) polar 
B) s2p hybridized central atom 
C) see-saw molecular geometry 
D) sp hybridized central atom 
E) nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds. D

Question 3

Match the following.
-SF4

Accepted Answer

A) polar 
B) s2p hybridized central atom 
C) see-saw molecular geometry 
D) sp hybridized central atom 
E) nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds. 
A) polar 
B) s2p hybridized central atom 
C) see-saw molecular geometry 
D) sp hybridized central atom 
E) nonpolar,but contains a polar covalent bond
F)octahedral electron geometry
G)polar,but contains no polar bonds. C

Question 4

How many of the following molecules have sp3 hybridization on the central atom? XeCl4 CH4 SF4 C2H2

Accepted Answer

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

Question 5

How many electrons are present in the bonding MO orbital of H2?

Accepted Answer

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

Question 6

A molecule containing a central atom with sp3d hybridization has a(n)________ electron geometry.

Accepted Answer

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

Question 7

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule.
PF3 OF2 PF4⁺

Accepted Answer

A) PF3 2 4⁺ 
B) OF2 3  4⁺ 
C) OF2 4⁺ 3 
D) PF4⁺ 2 3 
E) PF4⁺ 3 2 
A) PF3 2 4⁺ 
B) OF2 3  4⁺ 
C) OF2 4⁺ 3 
D) PF4⁺ 2 3 
E) PF4⁺ 3 2

Question 8

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 9

Determine the electron geometry (eg)and molecular geometry(mg)of BCl3.

Accepted Answer

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

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

Question 11

What is the O-B-O bond angle in BO33-?

Accepted Answer

A) less than 109.5° 
B) 109.5° 
C) 120° 
D) greater than 120° 
A) less than 109.5° 
B) 109.5° 
C) 120° 
D) greater than 120°

Question 12

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 13

Explain why oil and water do not mix.

Accepted Answer

Water molecules are

Question 14

Which will make the molecule AB2 bent in shape?

Accepted Answer

A) the bonding electrons 
B) the nonbonding electrons 
C) the lone pairs on atom A 
D) the bond pairs 
A) the bonding electrons 
B) the nonbonding electrons 
C) the lone pairs on atom A 
D) the bond pairs

Question 15

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 16

Using the VSEPR model,the molecular geometry of the central atom in XeF2 is ________.

Accepted Answer

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

Question 17

Draw the Lewis structure for SF6.What is the hybridization on the S atom?

Accepted Answer

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

Question 18

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 19

Determine the electron geometry,molecular geometry 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 = see-saw,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 = see-saw,polar 
D) eg = octahedral,mg = trigonal bipyramidal,nonpolar 
E) eg = octahedral,mg = octahedral,nonpolar

Question 20

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 NCl3 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⁻

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

Match the following. -BeF₂

Match the following. -SF₄

How many of the following molecules have sp³ hybridization on the central atom? XeCl₄ CH₄ SF₄ C₂H₂

How many electrons are present in the bonding MO orbital of H₂?

A molecule containing a central atom with sp³d hybridization has a(n)________ electron geometry.

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF₃ OF₂ PF₄^⁺

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

Determine the electron geometry (eg)and molecular geometry(mg)of BCl₃.

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

What is the O-B-O bond angle in BO₃^3-?

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

Explain why oil and water do not mix.

Which will make the molecule AB₂ bent in shape?

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

Using the VSEPR model,the molecular geometry of the central atom in XeF₂ is ________.

Draw the Lewis structure for SF₆.What is the hybridization on the S atom?

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

Determine the electron geometry,molecular geometry and polarity of SF₆ .

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 NCl₃ NO₂^⁻

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

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

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

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

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

Match the following. -BeF2

Match the following. -SF4

How many of the following molecules have sp3 hybridization on the central atom? XeCl4 CH4 SF4 C2H2

How many electrons are present in the bonding MO orbital of H2?

A molecule containing a central atom with sp3d hybridization has a(n)________ electron geometry.

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF3 OF2 PF4⁺

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

Determine the electron geometry (eg)and molecular geometry(mg)of BCl3.

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

What is the O-B-O bond angle in BO33-?

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

Explain why oil and water do not mix.

Which will make the molecule AB2 bent in shape?

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

Using the VSEPR model,the molecular geometry of the central atom in XeF2 is ________.

Draw the Lewis structure for SF6.What is the hybridization on the S atom?

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

Determine the electron geometry,molecular geometry and polarity of SF6 .

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 NCl3 NO2⁻

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

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

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Match the following. -BeF₂

Match the following. -SF₄

How many of the following molecules have sp³ hybridization on the central atom? XeCl₄ CH₄ SF₄ C₂H₂

How many electrons are present in the bonding MO orbital of H₂?

A molecule containing a central atom with sp³d hybridization has a(n)________ electron geometry.

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF₃ OF₂ PF₄^⁺

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

Determine the electron geometry (eg)and molecular geometry(mg)of BCl₃.

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

What is the O-B-O bond angle in BO₃^3-?

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

Which will make the molecule AB₂ bent in shape?

Using the VSEPR model,the molecular geometry of the central atom in XeF₂ is ________.

Draw the Lewis structure for SF₆.What is the hybridization on the S atom?

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

Determine the electron geometry,molecular geometry and polarity of SF₆ .

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 NCl₃ NO₂^⁻