Question 1

A molecule with the formula AX3E uses _________ to form its bonds.

Accepted Answer

A)   s and p atomic orbitals
B)   sp3 hybrid orbitals
C)   sp2 hybrid orbitals
D)   sp hybrid orbitals
E)   sp3d2 hybrid orbitalsF) B) and D)
G) A) and C)

Question 2

According to valence bond theory, which orbitals on N and H overlap in the NH3 molecule?

Accepted Answer

A)   2p on N overlaps with 2s on H
B)   2p on N overlaps with 1s on H
C)   2s on N overlaps with 1s on H
D)   sp3 on N overlaps with sp on H
E)   sp3 on N overlaps with 1s on HF) B) and C)
G) All of the above

Question 3

Valence bond theory predicts that bromine will use _____ hybrid orbitals in BrF3.

Accepted Answer

A)   sp2
B)   sp3
C)   sp3d
D)   sp4
E)   sp3d2F) A) and B)
G) C) and D)

Question 4

In molecular orbital theory, combination of two atomic orbitals produces two molecular orbitals.

Accepted Answer

A) True 
 B)False

Question 5

Hybrid orbitals of the sp3d type occur in sets of four.

Accepted Answer

A) True 
 B)False

Question 6

Valence bond theory predicts that xenon will use _____ hybrid orbitals in XeOF4.

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   sp3d2F) D) and E)
G) A) and C)

Question 7

Determine the shape (geometry)  of PCl3 and then decide on the appropriate hybridization of phosphorus in this molecule. (Phosphorus is the central atom.)

Accepted Answer

A)   sp3
B)   sp2
C)   sp
D)   sp3d
E)   sp3d2F) B) and E)
G) B) and D)

Question 8

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO3-.

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   sp3d2F) A) and C)
G) A) and E)

Question 9

According to valence bond theory, overlap of bonding orbitals of atoms will weaken a bond, due to electron-electron repulsion.

Accepted Answer

A) True 
 B)False

Question 10

According to valence bond theory, the triple bond in ethyne (acetylene, C2H2)  consists of

Accepted Answer

A)   three σ bonds and no 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > bonds.
B)   two σ bonds and one 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > bond.
C)   one σ bond and two 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > bonds.
D)   no σ bonds and three 2H2)  consists of 
A)   three σ bonds and no   bonds. 
B)   two σ bonds and one   bond. 
C)   one σ bond and two   bonds. 
D)   no σ bonds and three   bonds. 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > bonds.
E)   None of these choices are correct.F) A) and C)
G) None of the above

Question 11

Carbon uses ______ hybrid orbitals in ClCN.

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   sp3d2F) C) and E)
G) C) and D)

Question 12

Which one of the following statements about orbital hybridization is incorrect?

Accepted Answer

A)   The carbon atom in CH4 is sp3 hybridized.
B)   The carbon atom in CO2 is sp hybridized.
C)   The nitrogen atom in NH3 is sp2 hybridized.
D)   sp2 hybrid orbitals are coplanar, and at 120° to each other.
E)   sp hybrid orbitals lie at 180° to each other.F) A) and D)
G) A) and E)

Question 13

According to molecular orbital (MO)  theory, the twelve outermost electrons in the O2 molecule are distributed as follows:

Accepted Answer

A)   12 in bonding MOs, 0 in antibonding MOs.
B)   10 in bonding MOs, 2 in antibonding MOs.
C)   9 in bonding MOs, 3 in antibonding MOs.
D)   8 in bonding MOs, 4 in antibonding MOs.
E)   7 in bonding MOs, 5 in antibonding MOs.F) A) and B)
G) B) and C)

Question 14

A carbon-carbon triple bond in a molecule may give rise to the existence of cis and trans isomers.

Accepted Answer

A) True 
 B)False

Question 15

The nitrosonium ion, NO+, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which of the following statements about NO+ is correct?

Accepted Answer

A)   NO+ has a bond order of 2 and is paramagnetic.
B)   NO+ has a bond order of 2 and is diamagnetic.
C)   NO+ has a bond order of 3 and is paramagnetic.
D)   NO+ has a bond order of 3 and is diamagnetic.
E)   None of these choices are correct.F) A) and D)
G) A) and E)

Question 16

In the valence bond treatment, a  bond is formed when two 2p orbitals overlap side to side.

Accepted Answer

A) True 
 B)False

Question 17

Overlap of two sp2 hybrid orbitals produces a  bond.

Accepted Answer

A) True 
 B)False

Question 18

How many sigma and pi bonds, respectively, are in the molecule below? CH3CH2CHCHCH3?

Accepted Answer

A)   16, 1
B)   16, 0
C)   15, 1
D)   15, 0
E)   14, 1F) A) and B)
G) A) and E)

Question 19

In molecular orbital theory, combination of two 2p atomic orbitals may give rise to either σ or π type molecular orbitals.

Accepted Answer

A) True 
 B)False

Question 20

In the valence bond treatment, overlap of an s orbital on one atom with an sp3 orbital on another atom can give rise to a σ bond.

Accepted Answer

A) True 
 B)False

Exam 11: Theories of Covalent Bonding

In the valence bond treatment, overlap of an s orbital on one atom with an sp3 orbital on another atom can give rise to a σ bond.

Correct AnswerverifiedShow Answer

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO3-.

Correct AnswerverifiedShow Answer

The nitrosonium ion, NO+, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which of the following statements about NO+ is correct?

Correct AnswerverifiedShow Answer

Which one of the following statements about orbital hybridization is incorrect?

Correct AnswerverifiedShow Answer

In molecular orbital theory, combination of two 2p atomic orbitals may give rise to either σ or π type molecular orbitals.

Correct AnswerverifiedShow Answer

Valence bond theory predicts that xenon will use _____ hybrid orbitals in XeOF4.

Correct AnswerverifiedShow Answer

According to valence bond theory, overlap of bonding orbitals of atoms will weaken a bond, due to electron-electron repulsion.

Correct AnswerverifiedShow Answer

Hybrid orbitals of the sp3d type occur in sets of four.

Correct AnswerverifiedShow Answer

A molecule with the formula AX3E uses _________ to form its bonds.

Correct AnswerverifiedShow Answer

According to valence bond theory, which orbitals on N and H overlap in the NH3 molecule?

Correct AnswerverifiedShow Answer

Carbon uses ______ hybrid orbitals in ClCN.

Correct AnswerverifiedShow Answer

In the valence bond treatment, a bond is formed when two 2p orbitals overlap side to side.

Correct AnswerverifiedShow Answer

How many sigma and pi bonds, respectively, are in the molecule below? CH3CH2CHCHCH3?

Correct AnswerverifiedShow Answer

A carbon-carbon triple bond in a molecule may give rise to the existence of cis and trans isomers.

Correct AnswerverifiedShow Answer

Determine the shape (geometry) of PCl3 and then decide on the appropriate hybridization of phosphorus in this molecule. (Phosphorus is the central atom.)

Correct AnswerverifiedShow Answer

According to valence bond theory, the triple bond in ethyne (acetylene, C2H2) consists of

Correct AnswerverifiedShow Answer

According to molecular orbital (MO) theory, the twelve outermost electrons in the O2 molecule are distributed as follows:

Correct AnswerverifiedShow Answer

Overlap of two sp2 hybrid orbitals produces a bond.

Correct AnswerverifiedShow Answer

Valence bond theory predicts that bromine will use _____ hybrid orbitals in BrF3.

Correct AnswerverifiedShow Answer

In molecular orbital theory, combination of two atomic orbitals produces two molecular orbitals.

Correct AnswerverifiedShow Answer

In the valence bond treatment, overlap of an s orbital on one atom with an sp³ orbital on another atom can give rise to a σ bond.

Correct Answer
verified

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO₃^-.

Correct Answer
verified

The nitrosonium ion, NO⁺, forms a number of interesting complexes with nickel, cobalt, and iron. According to molecular orbital theory, which of the following statements about NO⁺ is correct?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Valence bond theory predicts that xenon will use _____ hybrid orbitals in XeOF₄.

Correct Answer
verified

Correct Answer
verified

Hybrid orbitals of the sp³d type occur in sets of four.

Correct Answer
verified

A molecule with the formula AX₃E uses _________ to form its bonds.

Correct Answer
verified

According to valence bond theory, which orbitals on N and H overlap in the NH₃ molecule?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many sigma and pi bonds, respectively, are in the molecule below? CH₃CH₂CHCHCH₃?

Correct Answer
verified

Correct Answer
verified

Determine the shape (geometry) of PCl₃ and then decide on the appropriate hybridization of phosphorus in this molecule. (Phosphorus is the central atom.)

Correct Answer
verified

According to valence bond theory, the triple bond in ethyne (acetylene, C₂H₂) consists of

Correct Answer
verified

According to molecular orbital (MO) theory, the twelve outermost electrons in the O₂ molecule are distributed as follows:

Correct Answer
verified

Overlap of two sp² hybrid orbitals produces a bond.

Correct Answer
verified

Valence bond theory predicts that bromine will use _____ hybrid orbitals in BrF₃.

Correct Answer
verified

Correct Answer
verified