Question 1

For which of the following molecules does the carbon atom have sp3 hybridization?

Accepted Answer

A)  Cl2CO 
B)  CO 
C)  CS2 
D)  CH2Cl2 
E)  HCN 
A)  Cl2CO 
B)  CO 
C)  CS2 
D)  CH2Cl2 
E)  HCN

Question 2

Atomic orbitals combine most effectively to form molecular orbitals when

Accepted Answer

A)  electrons in the orbitals have no spins. 
B)  electrons in the orbitals have the same spin. 
C)  the atoms have an equal number of valence electrons. 
D)  the atomic orbitals have similar energies. 
E)  only d-orbitals are used in bonding. 
A)  electrons in the orbitals have no spins. 
B)  electrons in the orbitals have the same spin. 
C)  the atoms have an equal number of valence electrons. 
D)  the atomic orbitals have similar energies. 
E)  only d-orbitals are used in bonding.

Question 3

A molecular orbital that decreases the electron density between two nuclei is said to be ____.

Accepted Answer

A)  hybridized 
B)  bonding 
C)  antibonding 
D)  pi-bonding 
E)  nonpolar 
A)  hybridized 
B)  bonding 
C)  antibonding 
D)  pi-bonding 
E)  nonpolar

Question 4

The electron configuration of a particular diatomic species is: [core electrons](σ2s)2(σ*2s)2(σ2p)2(π2p)3(π*2p)0
What is the bond order for this species?

Accepted Answer

A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3 
A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3

Question 5

Benzene, C6H6, consists of a six member ring of sp2 hybridized carbon atoms. Each carbon atom has one unhybridized p orbital. How many π2p bonding, antibonding, and nonbonding molecular orbitals exist for benzene?

Accepted Answer

A)  Three π2p molecular orbitals exist; two bonding and one antibonding. 
B)  Three π2p molecular orbitals exist; one bonding, one antibonding, and one nonbonding. 
C)  Six π2p molecular orbitals exist; three bonding and three antibonding. 
D)  Six π2p molecular orbitals exist; two bonding, two nonbonding, and two antibonding. 
E)  Twelve π2p molecular orbitals exist; six bonding and six antibonding. 
A)  Three π2p molecular orbitals exist; two bonding and one antibonding. 
B)  Three π2p molecular orbitals exist; one bonding, one antibonding, and one nonbonding. 
C)  Six π2p molecular orbitals exist; three bonding and three antibonding. 
D)  Six π2p molecular orbitals exist; two bonding, two nonbonding, and two antibonding. 
E)  Twelve π2p molecular orbitals exist; six bonding and six antibonding.

Question 6

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. According to molecular orbital theory, what is the bond order of O2-?

Accepted Answer

A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3 
A)  1 
B)  1.5 
C)  2 
D)  2.5 
E)  3

Question 7

What is the molecular geometry around an atom that has 2 σ bonds, 2 π bonds, and 0 lone pair of electrons?

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 8

Which of the underlined atoms (C1, C2, N, and O) are sp2 hybridized?

Accepted Answer

A)  N and O 
B)  C1 and N 
C)  C1 and O 
D)  C2 and N 
E)  C1 and C2 
A)  N and O 
B)  C1 and N 
C)  C1 and O 
D)  C2 and N 
E)  C1 and C2

Question 9

What is the molecular geometry around a central atom that is sp2 hybridized, has three sigma bonds, and one pi bond?

Accepted Answer

A)  trigonal-planar 
B)  trigonal-pyramidal 
C)  bent 
D)  T-shaped 
E)  tetrahedral 
A)  trigonal-planar 
B)  trigonal-pyramidal 
C)  bent 
D)  T-shaped 
E)  tetrahedral

Question 10

Which diatomic molecule or ion has valence electron molecular orbital configuration provided below? [core electrons](σ2s)2(σ*2s)2(σ2p)2(π2p)4(π*2p)3

Accepted Answer

A)  B2 
B)  O2- 
C)  O22+ 
D)  Ne2 
E)  Li2 
A)  B2 
B)  O2- 
C)  O22+ 
D)  Ne2 
E)  Li2

Question 11

If 7 orbitals on one atom overlap 7 orbitals on a second atom, how many molecular orbitals will be formed?

Accepted Answer

A)  1 
B)  2 
C)  7 
D)  14 
E)  None of these 
A)  1 
B)  2 
C)  7 
D)  14 
E)  None of these

Question 12

SF3+, has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry. The hybridization of the central sulfur atom is ________.

Accepted Answer

Question 13

In molecular orbital theory, the bond order is defined as 1/2 × (the number of electrons in ________ orbitals minus the number of electrons in antibonding orbitals).

Accepted Answer

The answer of In molecular orbital theory, the bond order...

Question 14

Which theory, valence bond or molecule orbital, correctly predicts the existence of paramagnetic molecules?

Accepted Answer

Molecular

Question 15

For which of the following molecules or ions does the central atom have sp hybridization: N3-, O3, and SF3+?

Accepted Answer

A)  N3- only 
B)  O3 only 
C)  SF3+ only 
D)  O3 and SF3+ 
E)  SF3+ and N3- 
A)  N3- only 
B)  O3 only 
C)  SF3+ only 
D)  O3 and SF3+ 
E)  SF3+ and N3-

Question 16

Which of the following hybridized atoms is impossible to form?

Accepted Answer

A)  An sp hybridized nitrogen atom 
B)  An sp2 hybridized oxygen atom 
C)  An sp3 hybridized boron atom 
D)  An sp3 hybridized phosphorus atom 
E)  An sp3 hybridized hydrogen atom 
A)  An sp hybridized nitrogen atom 
B)  An sp2 hybridized oxygen atom 
C)  An sp3 hybridized boron atom 
D)  An sp3 hybridized phosphorus atom 
E)  An sp3 hybridized hydrogen atom

Question 17

What is the hybridization of carbon atoms present in acetylene?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  sp5 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  sp5

Question 18

Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For oxygen and fluorine, the σ2p orbital should be lower in energy than the π2p orbitals. However, the diagram will still yield correct bond order and magnetic behavior for these molecules
 
-Refer to Diagram 9-1. Assuming that the molecular orbital energy diagram for a homonuclear diatomic molecule applies to a heteronuclear diatomic molecule, which of the following species is paramagnetic?

Accepted Answer

A)  NO+ 
B)  CO 
C)  CN- 
D)  OF- 
E)  NO 
A)  NO+ 
B)  CO 
C)  CN- 
D)  OF- 
E)  NO

Question 19

What is the hybridization of oxygen atom O?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  none 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp4 
E)  none

Question 20

In valence bond theory, each sigma bond in CH4 is formed from the overlap of a hydrogen atom's 1s orbital with a(n) ________ hybridized orbital on the carbon atom.

Accepted Answer

Exam 10: Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

For which of the following molecules does the carbon atom have sp3 hybridization?

Atomic orbitals combine most effectively to form molecular orbitals when

A molecular orbital that decreases the electron density between two nuclei is said to be ____.

The electron configuration of a particular diatomic species is: [core electrons](σ2s)2(σ*2s)2(σ2p)2(π2p)3(π*2p)0 What is the bond order for this species?

Benzene, C6H6, consists of a six member ring of sp2 hybridized carbon atoms. Each carbon atom has one unhybridized p orbital. How many π2p bonding, antibonding, and nonbonding molecular orbitals exist for benzene?

What is the molecular geometry around an atom that has 2 σ bonds, 2 π bonds, and 0 lone pair of electrons?

Which of the underlined atoms (C1, C2, N, and O) are sp2 hybridized?

What is the molecular geometry around a central atom that is sp2 hybridized, has three sigma bonds, and one pi bond?

Which diatomic molecule or ion has valence electron molecular orbital configuration provided below? [core electrons](σ2s)2(σ*2s)2(σ2p)2(π2p)4(π*2p)3

If 7 orbitals on one atom overlap 7 orbitals on a second atom, how many molecular orbitals will be formed?

SF3+, has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry. The hybridization of the central sulfur atom is ________.

In molecular orbital theory, the bond order is defined as 1/2 × (the number of electrons in ________ orbitals minus the number of electrons in antibonding orbitals).

Which theory, valence bond or molecule orbital, correctly predicts the existence of paramagnetic molecules?

For which of the following molecules or ions does the central atom have sp hybridization: N3-, O3, and SF3+?

Which of the following hybridized atoms is impossible to form?

What is the hybridization of carbon atoms present in acetylene?

What is the hybridization of oxygen atom O?

In valence bond theory, each sigma bond in CH4 is formed from the overlap of a hydrogen atom's 1s orbital with a(n) ________ hybridized orbital on the carbon atom.

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

For which of the following molecules does the carbon atom have sp³ hybridization?

The electron configuration of a particular diatomic species is: [core electrons](σ_2s)²(σ_2s)²(σ_2p)²(π_2p)³(π_2p)⁰ What is the bond order for this species?

Benzene, C₆H₆, consists of a six member ring of sp² hybridized carbon atoms. Each carbon atom has one unhybridized p orbital. How many π_2p bonding, antibonding, and nonbonding molecular orbitals exist for benzene?

Which of the underlined atoms (C₁, C₂, N, and O) are sp² hybridized?

What is the molecular geometry around a central atom that is sp² hybridized, has three sigma bonds, and one pi bond?

Which diatomic molecule or ion has valence electron molecular orbital configuration provided below? [core electrons](σ_2s)²(σ_2s)²(σ_2p)²(π_2p)⁴(π_2p)³

SF₃⁺, has a tetrahedral electron-pair geometry and a trigonal-pyramidal molecular geometry. The hybridization of the central sulfur atom is ________.

For which of the following molecules or ions does the central atom have sp hybridization: N₃^-, O₃, and SF₃+?

In valence bond theory, each sigma bond in CH₄ is formed from the overlap of a hydrogen atom's 1s orbital with a(n) ________ hybridized orbital on the carbon atom.