Question 1

A molecule with the formula AX4E2 uses _________ to form its bonds.

Accepted Answer

A)   sp hybrid orbitals
B)   sp2 hybrid orbitals
C)   sp3 hybrid orbitals
D)   sp3d hybrid orbitals
E)   sp3d2 hybrid orbitalsF) B) and C)
G) D) and E)

Question 2

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnF5-.

Accepted Answer

A)   sp2
B)   sp3
C)   sp3d
D)   sp3d 2
E)   d2sp3F) A) and C)
G) B) and C)

Question 3

Which one, if any, of the following statements about the MO treatment of the bonding in benzene is correct?

Accepted Answer

A)   MO theory uses resonance to describe the delocalized nature of the bonding in benzene.
B)   The lowest energy pi-bonding orbital in benzene can hold up to 6 electrons.
C)   MO theory predicts that benzene should be paramagnetic.
D)   The lowest energy pi-bonding MO in benzene has two hexagonal lobes, above and below the plane of the carbon atoms.
E)   None of the above statements is correct.F) C) and D)
G) B) and D)

Question 4

In one sentence state how molecular orbitals are usually obtained.

Accepted Answer

By the linear combin...

Question 5

Carbon uses ______ hybrid orbitals in ClCN.

Accepted Answer

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

Question 6

In molecular orbital theory, combination of two 2p atomic orbitals may give rise to either F1F1F1S1F1F1F10 or F1F1F1S1F1F1F10 type molecular orbitals.

Accepted Answer

A) True 
 B)False

Question 7

In the context of molecular orbital (MO) theory, explain how atomic p orbitals can give rise to:
a. a F1F1F1S1F1F1F10 MO
b. a F1F1F1S1F1F1F10 MO

Accepted Answer

a. A  MO arises when ato...

Question 8

A molecule with the formula AX2 uses _________ to form its bonds.

Accepted Answer

A)   sp hybrid orbitals
B)   sp2 hybrid orbitals
C)   sp3 hybrid orbitals
D)   sp3d hybrid orbitals
E)   sp3d2 hybrid orbitalsF) D) and E)
G) A) and B)

Question 9

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic.

Accepted Answer

A) True 
 B)False

Question 10

In not more than two sentences, explain when and why chemists make use of the concept of hybridization.

Accepted Answer

Chemists postulate hybridizati...

Question 11

a. In the context of valence bond theory, explain the difference in geometry between a F1F1F1S1F1F1F10 and a F1F1F1S1F1F1F10 bond. Use a real molecule to illustrate your answer.
b. What two important differences are there in the properties of F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10 bonds, in terms of how they affect the structure and reactivity of molecules?

Accepted Answer

a. A  bond has its regio...

Question 12

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) B) and E)

Question 13

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

Accepted Answer

A)   BeCl2 sp2
B)   SiH4 sp3
C)   BF3 sp2
D)   C2H2 sp
E)   H2O sp3F) A) and E)
G) B) and E)

Question 14

Select the correct statement about -bonds in valence bond theory.

Accepted Answer

A)   A  bond is stronger than a sigma bond.
B)   A  bond can hold 4 electrons, two above and two below the -bond axis.
C)   A carbon-carbon double bond consists of two  bonds.
D)   A  bond is the same strength as a  bond.
E)   A  bond between two carbon atoms restricts rotation about the C-C axis.F) A) and D)
G) None of the above

Question 15

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) C) and E)
G) C) and D)

Question 16

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 the above statements is correct.F) B) and D)
G) B) and C)

Question 17

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnCl3-.

Accepted Answer

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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

In molecular orbital theory, molecules with an even number of electrons will have bond orders which are whole numbers.

Accepted Answer

A) True 
 B)False

Question 20

One can safely assume that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact. According to molecular orbital theory, what will be the bond order for the Cl2+ ion?

Accepted Answer

A)   0.5
B)   1
C)   1.5
D)   2
E)   none of the aboveF) A) and D)
G) C) and D)

Exam 11: Theories of Covalent Bonding

Carbon uses ______ hybrid orbitals in ClCN.

Correct Answer
verified

In not more than two sentences, explain when and why chemists make use of the concept of hybridization.

Correct Answer
verified
Chemists postulate hybridizati...
View 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 Answer
verified

One can safely assume that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact. According to molecular orbital theory, what will be the bond order for the Cl₂⁺ ion?

Correct Answer
verified

A molecule with the formula AX₂ uses _________ to form its bonds.

Correct Answer
verified

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

Correct Answer
verified

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnCl₃^-.

Correct Answer
verified

In the context of molecular orbital (MO) theory, explain how atomic p orbitals can give rise to: a. a  MO b. a  MO

Correct Answer
verified
a. A  MO arises when ato...
View Answer

In one sentence state how molecular orbitals are usually obtained.

Correct Answer
verified
By the linear combin...
View Answer

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

Correct Answer
verified

Correct Answer
verified
a. A  bond has its regio...
View Answer

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic.

Correct Answer
verified

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

Correct Answer
verified

A molecule with the formula AX₄E₂ uses _________ to form its bonds.

Correct Answer
verified

In molecular orbital theory, molecules with an even number of electrons will have bond orders which are whole numbers.

Correct Answer
verified

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

Correct Answer
verified

Which one, if any, of the following statements about the MO treatment of the bonding in benzene is correct?

Correct Answer
verified

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

Correct Answer
verified

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnF₅^-.

Correct Answer
verified

Select the correct statement about -bonds in valence bond theory.

Correct Answer
verified

Exam 11: Theories of Covalent Bonding

Carbon uses ______ hybrid orbitals in ClCN.

Correct AnswerverifiedShow Answer

In not more than two sentences, explain when and why chemists make use of the concept of hybridization.

Correct AnswerverifiedChemists postulate hybridizati...View AnswerShow 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

One can safely assume that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact. According to molecular orbital theory, what will be the bond order for the Cl2+ ion?

Correct AnswerverifiedShow Answer

A molecule with the formula AX2 uses _________ to form its bonds.

Correct AnswerverifiedShow Answer

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

Correct AnswerverifiedShow Answer

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnCl3-.

Correct AnswerverifiedShow Answer

In the context of molecular orbital (MO) theory, explain how atomic p orbitals can give rise to: a. a  MO b. a  MO

Correct Answerverifieda. A  MO arises when ato...View AnswerShow Answer

In one sentence state how molecular orbitals are usually obtained.

Correct AnswerverifiedBy the linear combin...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answerverifieda. A  bond has its regio...View AnswerShow Answer

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A molecule with the formula AX4E2 uses _________ to form its bonds.

Correct AnswerverifiedShow Answer

In molecular orbital theory, molecules with an even number of electrons will have bond orders which are whole numbers.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which one, if any, of the following statements about the MO treatment of the bonding in benzene is correct?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnF5-.

Correct AnswerverifiedShow Answer

Select the correct statement about -bonds in valence bond theory.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Chemists postulate hybridizati...
View 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 Answer
verified

One can safely assume that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact. According to molecular orbital theory, what will be the bond order for the Cl₂⁺ ion?

Correct Answer
verified

A molecule with the formula AX₂ uses _________ to form its bonds.

Correct Answer
verified

Correct Answer
verified

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnCl₃^-.

Correct Answer
verified

Correct Answer
verified
a. A  MO arises when ato...
View Answer

Correct Answer
verified
By the linear combin...
View Answer

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

Correct Answer
verified

Correct Answer
verified
a. A  bond has its regio...
View Answer

Correct Answer
verified

Correct Answer
verified

A molecule with the formula AX₄E₂ uses _________ to form its bonds.

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Valence bond theory predicts that tin will use _____ hybrid orbitals in SnF₅^-.

Correct Answer
verified

Correct Answer
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