Question 1

The butane molecule, C₄H₁₀, has a total of ________ σ-bonds.

Accepted Answer

The answer of The butane molecule, C₄H₁₀, has a total...

Question 2

If formal charge considerations are taken into account, how many $\pi$-bond(s)is/are in the SO32- ion?

Accepted Answer

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

Question 3

Which best explains the polarity of the PCl3 molecule?

Accepted Answer

A) Vector addition yields a net zero dipole moment. 
B) The tetragonal shape leads to no overall polarity. 
C) The trigonal pyramid shape leads to a nonpolar molecule. 
D) The P-Cl dipole moments sum to a net dipole moment. 
E) Two nonbonding electron pairs cause an overall polarity.

Question 4

The electrons in the delocalized molecular orbitals of benzene

Accepted Answer

A) are free to move around the six-membered ring. 
B) are restricted to the space between only two carbon atoms. 
C) are used to bond the hydrogens to the carbon ring. 
D) only contain one electron each. 
E) are responsible for bond lengths that are longer in only three bonds in the carbon ring.

Question 5

Based on the Lewis structure, the number of electron domains in the valence shell of the carbon atom in the CO32- ion is

Accepted Answer

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

Question 6

The molecular geometry of the SeF4 molecule is best described as

Accepted Answer

A) trigonal pyramidal. 
B) square planar. 
C) regular tetrahedral. 
D) triangular planar. 
E) distorted tetrahedral.

Question 7

What type of hybrid orbitals do the carbon atoms have in C2H6?

Accepted Answer

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

Question 8

Application of the VSEPR model to the NCl3 molecule leads to the prediction that

Accepted Answer

A) the molecule should have trigonal pyramidal geometry. 
B) the molecule should have delocalized valence electrons. 
C) the molecule should be nonpolar. 
D) the formal charge on the center atom is +3. 
E) the molecule should have a planar triangular geometry.

Question 9

The He2 molecule, according to MO theory, has a bond order of

Accepted Answer

A) 0 
B) 0.5 
C) 1.0 
D) 1.5 
E) 2.0

Question 10

Based on application of the VSEPR theory, which molecule has a bent (v-shaped)geometry?

Accepted Answer

A) CO2 
B) CS2 
C) KrF2 
D) C2H2 
E) SO2

Question 11

What hybrid orbitals are used by the carbon atom in CH4 for bonding?

Accepted Answer

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

Question 12

Any number of electrons, with paired spins, can be shared by two overlapping atomic orbitals to yield the maximum potential energy for the entire system, and ultimately produce the strongest possible covalent bond.

Accepted Answer

A) True 
 B)False

Question 13

An energy level scheme for the orbitals of second row diatomic molecules O2 through Ne2 , lists the molecular orbitals in the following order of increasing energy $\sigma$2s 2s 2p(z)2p(y), $\pi$2p(x) 2p(y), $\pi$*2p(x)2p(z)
Based on this energy level scheme, how many unpaired electrons are in all of the antibonding molecular orbitals of the O2- ion in its ground state?

Accepted Answer

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

Question 14

Which of the five basic geometries for molecules and ions has the smallest bond angle?

Accepted Answer

A) linear 
B) planar triangular 
C) tetrahedral 
D) octahedral 
E) These all have the same bond angles.

Question 15

What is the shape of the HArF molecule?

Accepted Answer

The answer of What is the shape of the HArF...

Question 16

The valence shell electron pair repulsion theory is based on the concept that

Accepted Answer

A) only two electrons can occupy an atomic orbital. 
B) the position and speed of the electron are somewhat uncertain. 
C) electron pairs tend to stay as far apart as possible to minimize repulsions between them. 
D) electronegativity tends to promote the formation of polar bonds. 
E) electrons are added to the lowest energy atomic orbitals first.

Question 17

An energy level scheme for the orbitals of second row diatomic molecules O2 through Ne2, lists the molecular orbitals in the following order of increasing energy $\sigma$2s 2s 2p(z)2p(y), $\pi$2p(x) 2p(y), $\pi$*2p(x)2p(z)
Based on this energy level scheme, the bond order for the bond in the O2+ ion in its ground state is

Accepted Answer

A) 1.0 
B) 1.5 
C) 2.0 
D) 2.5 
E) 3.0

Question 18

Formation of a π-bond requires that two unhybridized ________ orbitals overlap sideways.

Accepted Answer

The answer of Formation of a π-bond requires that two...

Question 19

The central atom in BrF5 uses sp3d2 hybridization. It must therefore have ________ ?bonds and ________ lone pair(s)of electrons in the valence shell of the central atom.

Accepted Answer

A) 1, 5 
B) 3, 3 
C) 5, 0 
D) 5, 1 
E) 6, 0

Question 20

What is the hybridization of the nitrogen atom in NH3?

Accepted Answer

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

Exam 10: Theories of Bonding and Structure

The butane molecule, C₄H₁₀, has a total of ________ σ-bonds.

If formal charge considerations are taken into account, how many $\pi$ -bond(s) is/are in the SO₃^2- ion?

Which best explains the polarity of the PCl₃ molecule?

The electrons in the delocalized molecular orbitals of benzene

Based on the Lewis structure, the number of electron domains in the valence shell of the carbon atom in the CO₃^2- ion is

The molecular geometry of the SeF₄ molecule is best described as

What type of hybrid orbitals do the carbon atoms have in C₂H₆?

Application of the VSEPR model to the NCl₃ molecule leads to the prediction that

The He₂ molecule, according to MO theory, has a bond order of

Based on application of the VSEPR theory, which molecule has a bent (v-shaped) geometry?

What hybrid orbitals are used by the carbon atom in CH₄ for bonding?

Any number of electrons, with paired spins, can be shared by two overlapping atomic orbitals to yield the maximum potential energy for the entire system, and ultimately produce the strongest possible covalent bond.

Which of the five basic geometries for molecules and ions has the smallest bond angle?

What is the shape of the HArF molecule?

The valence shell electron pair repulsion theory is based on the concept that

Formation of a π-bond requires that two unhybridized ________ orbitals overlap sideways.

The central atom in BrF₅ uses sp³^d² hybridization. It must therefore have ?bonds and lone pair(s) of electrons in the valence shell of the central atom.

What is the hybridization of the nitrogen atom in NH₃?

Exam 10: Theories of Bonding and Structure

The butane molecule, C4H10, has a total of ________ σ-bonds.

If formal charge considerations are taken into account, how many π\piπ -bond(s) is/are in the SO32- ion?

Which best explains the polarity of the PCl3 molecule?

The electrons in the delocalized molecular orbitals of benzene

Based on the Lewis structure, the number of electron domains in the valence shell of the carbon atom in the CO32- ion is

The molecular geometry of the SeF4 molecule is best described as

What type of hybrid orbitals do the carbon atoms have in C2H6?

Application of the VSEPR model to the NCl3 molecule leads to the prediction that

The He2 molecule, according to MO theory, has a bond order of

Based on application of the VSEPR theory, which molecule has a bent (v-shaped) geometry?

What hybrid orbitals are used by the carbon atom in CH4 for bonding?

Any number of electrons, with paired spins, can be shared by two overlapping atomic orbitals to yield the maximum potential energy for the entire system, and ultimately produce the strongest possible covalent bond.

Which of the five basic geometries for molecules and ions has the smallest bond angle?

What is the shape of the HArF molecule?

The valence shell electron pair repulsion theory is based on the concept that

Formation of a π-bond requires that two unhybridized ________ orbitals overlap sideways.

The central atom in BrF5 uses sp3d2 hybridization. It must therefore have ________ ?bonds and ________ lone pair(s) of electrons in the valence shell of the central atom.

What is the hybridization of the nitrogen atom in NH3?

The butane molecule, C₄H₁₀, has a total of ________ σ-bonds.

If formal charge considerations are taken into account, how many $\pi$ -bond(s) is/are in the SO₃^2- ion?

Which best explains the polarity of the PCl₃ molecule?

Based on the Lewis structure, the number of electron domains in the valence shell of the carbon atom in the CO₃^2- ion is

The molecular geometry of the SeF₄ molecule is best described as

What type of hybrid orbitals do the carbon atoms have in C₂H₆?

Application of the VSEPR model to the NCl₃ molecule leads to the prediction that

The He₂ molecule, according to MO theory, has a bond order of

What hybrid orbitals are used by the carbon atom in CH₄ for bonding?

The central atom in BrF₅ uses sp³^d² hybridization. It must therefore have ?bonds and lone pair(s) of electrons in the valence shell of the central atom.

What is the hybridization of the nitrogen atom in NH₃?