Question 1

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 °\degree°  to each other.
E)   sp hybrid orbitals lie at 180 °\degree° to each other.

Question 2

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

Accepted Answer

Chemists postulate hybridizati...

Question 3

In one sentence state the basic principle of valence bond theory.

Accepted Answer

A covalent bond forms when the...

Question 4

What type of hybridization is needed to explain why ethyne, C2H2, is linear?

Accepted Answer

Question 5

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

Accepted Answer

A)   sp2
B)   sp3
C)   sp3d
D)   sp3d2
E)   d2sp3

Question 6

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 orbitals

Question 7

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 orbitals

Question 8

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 is correct.

Question 9

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)   sp3d2

Question 10

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO32¯.

Accepted Answer

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

Question 11

Carbon uses ______ hybrid orbitals in ClCN.

Accepted Answer

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

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)   sp3d2

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 sp3

Question 14

Describe the bonding in ethylene (ethene, C2H4) according to valence bond theory. Be sure to indicate the orbital hybridization on the carbon atoms. Draw a diagram clearly showing at least one bond of each type which occurs in the molecule.

Accepted Answer

The carbon atoms are sp² hybridized, leav...

Question 15

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 16

A) What simple experiment could you perform to show that a substance is paramagnetic?
B) What microscopic (atomic/molecular) feature must a substance possess in order to be paramagnetic?
C) Can it be predicted whether or not all homonuclear diatomic ions, X2+, will be paramagnetic? Explain.

Accepted Answer

a. Place a sample of the substance near ...

Exam 11: Theories of Covalent Bonding

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

Correct Answer
verified

Carbon uses ______ hybrid orbitals in ClCN.

Correct Answer
verified

What type of hybridization is needed to explain why ethyne, C₂H₂, is linear?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

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

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

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

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

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

In one sentence state the basic principle of valence bond theory.

Correct Answer
verified
A covalent bond forms when the...
View Answer

Describe the bonding in ethylene (ethene, C₂H₄) according to valence bond theory. Be sure to indicate the orbital hybridization on the carbon atoms. Draw a diagram clearly showing at least one bond of each type which occurs in the molecule.

Correct Answer
verified
The carbon atoms are sp² hybridized, leav...
View Answer

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO₃^2¯.

Correct Answer
verified

A) What simple experiment could you perform to show that a substance is paramagnetic? B) What microscopic (atomic/molecular) feature must a substance possess in order to be paramagnetic? C) Can it be predicted whether or not all homonuclear diatomic ions, X₂⁺, will be paramagnetic? Explain.

Correct Answer
verified
a. Place a sample of the substance near ...
View Answer

Exam 11: Theories of Covalent Bonding

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

Correct AnswerverifiedShow Answer

Carbon uses ______ hybrid orbitals in ClCN.

Correct AnswerverifiedShow Answer

What type of hybridization is needed to explain why ethyne, C2H2, is linear?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

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

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

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

In one sentence state the basic principle of valence bond theory.

Correct AnswerverifiedA covalent bond forms when the...View AnswerShow Answer

Describe the bonding in ethylene (ethene, C2H4) according to valence bond theory. Be sure to indicate the orbital hybridization on the carbon atoms. Draw a diagram clearly showing at least one bond of each type which occurs in the molecule.

Correct AnswerverifiedThe carbon atoms are sp2 hybridized, leav...View AnswerShow Answer

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO32¯.

Correct AnswerverifiedShow Answer

A) What simple experiment could you perform to show that a substance is paramagnetic? B) What microscopic (atomic/molecular) feature must a substance possess in order to be paramagnetic? C) Can it be predicted whether or not all homonuclear diatomic ions, X2+, will be paramagnetic? Explain.

Correct Answerverifieda. Place a sample of the substance near ...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

What type of hybridization is needed to explain why ethyne, C₂H₂, is linear?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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
Chemists postulate hybridizati...
View Answer

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

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

Correct Answer
verified
A covalent bond forms when the...
View Answer

Describe the bonding in ethylene (ethene, C₂H₄) according to valence bond theory. Be sure to indicate the orbital hybridization on the carbon atoms. Draw a diagram clearly showing at least one bond of each type which occurs in the molecule.

Correct Answer
verified
The carbon atoms are sp² hybridized, leav...
View Answer

Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO₃^2¯.

Correct Answer
verified

A) What simple experiment could you perform to show that a substance is paramagnetic? B) What microscopic (atomic/molecular) feature must a substance possess in order to be paramagnetic? C) Can it be predicted whether or not all homonuclear diatomic ions, X₂⁺, will be paramagnetic? Explain.

Correct Answer
verified
a. Place a sample of the substance near ...
View Answer