Question 1

Based on molecular orbital theory, the bond orders of the H-H bonds in H2, H2+, and H2- are ________, respectively

Accepted Answer

A) 1, 0, and 0 
B) 1, 1/2, and 0 
C) 1, 0, and 1/2 
D) 1, 1/2, and 1/2 
E) 1, 2, and 0 
A) 1, 0, and 0 
B) 1, 1/2, and 0 
C) 1, 0, and 1/2 
D) 1, 1/2, and 1/2 
E) 1, 2, and 0 D

Question 2

________ hybrid orbitals are used for bonding by Xe in the XeF4 molecule.

Accepted Answer

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

Question 3

In order to produce sp2 hybrid orbitals, ________ s atomic orbital(s)and ________ p atomic orbital(s)must be mixed.

Accepted Answer

A) one, two 
B) one, three 
C) one, one 
D) two, two 
E) two, three 
A) one, two 
B) one, three 
C) one, one 
D) two, two 
E) two, three A

Question 4

A typical triple bond consists of ________ sigma bond(s)and ______ pi bond(s).

Accepted Answer

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

Question 5

Based on molecular orbital theory, the bond order of the Be-Be bond in the Be2 molecule is ________.

Accepted Answer

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

Question 6

Consider the following species when answering the following questions:
(i) PClS1U1B13S1U1B0 
(ii) CClS1U1B14S1U1B0 
(iii) TeClS1U1B14S1U1B0 
(iv) XeFS1U1B14S1U1B0 
(v) SFS1U1B16S1U1B0
-For which of the molecules is the molecular geometry (shape)the same as the VSEPR electron domain arrangement (electron domain geometry)?

Accepted Answer

A) (i)and (ii) 
B) (i)and (iii) 
C) (ii)and (v) 
D) (iv)and (v) 
E) (v)only 
A) (i)and (ii) 
B) (i)and (iii) 
C) (ii)and (v) 
D) (iv)and (v) 
E) (v)only

Question 7

The N-N bond in HNNH consists of ________.

Accepted Answer

A) one σ bond and one π bond 
B) one σ bond and two π bonds 
C) two σ bonds and one π bond 
D) two σ bonds and two π bonds 
E) one σ bond and no π bonds 
A) one σ bond and one π bond 
B) one σ bond and two π bonds 
C) two σ bonds and one π bond 
D) two σ bonds and two π bonds 
E) one σ bond and no π bonds

Question 8

The hybridization of the terminal carbons in the H2C   C   CH2 molecule is ________.

Accepted Answer

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

Question 9

Of the molecules below, only ________ is nonpolar.

Accepted Answer

A) PF3 
B) Br2S 
C) TeCl2 
D) HCl 
E) BeH2 
A) PF3 
B) Br2S 
C) TeCl2 
D) HCl 
E) BeH2

Question 10

Of the following molecules, only ________ is polar.

Accepted Answer

A) CCl4 
B) BCl3 
C) NCl3 
D) BeCl2 
E) Cl2 
A) CCl4 
B) BCl3 
C) NCl3 
D) BeCl2 
E) Cl2

Question 11

The carbon-carbon σ bond in ethylene, H2C   CH2, results from the overlap of ________.

Accepted Answer

A) sp hybrid orbitals 
B) sp3 hybrid orbitals 
C) sp2 hybrid orbitals 
D) s atomic orbitals 
E) p atomic orbitals 
A) sp hybrid orbitals 
B) sp3 hybrid orbitals 
C) sp2 hybrid orbitals 
D) s atomic orbitals 
E) p atomic orbitals

Question 12

Using the VSEPR model, the molecular geometry of the central atom in SO3 is ________.

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 13

The bond order of a homonuclear diatomic molecule can be decreased by ________.

Accepted Answer

A) removing electrons from a bonding MO or adding electrons to an antibonding MO 
B) adding electrons to a bonding MO or removing electrons from an antibonding MO 
C) adding electrons to any MO 
D) removing electrons from any MO 
E) The bond order of a homonuclear diatomic molecule cannot be decreased by any means. 
A) removing electrons from a bonding MO or adding electrons to an antibonding MO 
B) adding electrons to a bonding MO or removing electrons from an antibonding MO 
C) adding electrons to any MO 
D) removing electrons from any MO 
E) The bond order of a homonuclear diatomic molecule cannot be decreased by any means.

Question 14

There is/are ________ hybridized s atomic orbital(s)in ansp2-hybridized carbon atom.

Accepted Answer

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

Question 15

The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________.

Accepted Answer

A) octahedral 
B) linear 
C) trigonal planar 
D) trigonal bipyramidal 
E) tetrahedral 
A) octahedral 
B) linear 
C) trigonal planar 
D) trigonal bipyramidal 
E) tetrahedral

Question 16

The sp2 atomic hybrid orbital set accommodates ________ electron domains.

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 17

Of the molecules below, only ________ is nonpolar.

Accepted Answer

A) BF3 
B) NF3 
C) IF3 
D) PBr3 
E) BrCl3 
A) BF3 
B) NF3 
C) IF3 
D) PBr3 
E) BrCl3

Question 18

There are ________ σ and ________ π bonds in the H-C≡C-H molecule.

Accepted Answer

A) 3 and 2 
B) 3 and 4 
C) 4 and 3 
D) 2 and 3 
E) 5 and 0 
A) 3 and 2 
B) 3 and 4 
C) 4 and 3 
D) 2 and 3 
E) 5 and 0

Question 19

A molecule has the formula AB3 and the central atom is in a different plane from the surrounding three atoms. Its molecular shape is ________.

Accepted Answer

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

Question 20

The central atom in a certain molecule has 4 nonbonded electron pairs and 2 bonded electron pairs in its valence shell. The molecular geometry of this molecule is ________.

Accepted Answer

A) seesaw 
B) square planar 
C) linear 
D) trigonal bipyramidal 
E) T-shaped 
A) seesaw 
B) square planar 
C) linear 
D) trigonal bipyramidal 
E) T-shaped

Exam 9: Molecular Geometry and Bonding Theories

Based on molecular orbital theory, the bond orders of the H-H bonds in H2, H2+, and H2- are ________, respectively

________ hybrid orbitals are used for bonding by Xe in the XeF4 molecule.

In order to produce sp2 hybrid orbitals, ________ s atomic orbital(s)and ________ p atomic orbital(s)must be mixed.

A typical triple bond consists of ________ sigma bond(s)and ______ pi bond(s).

Based on molecular orbital theory, the bond order of the Be-Be bond in the Be2 molecule is ________.

Consider the following species when answering the following questions: (i) PCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 -For which of the molecules is the molecular geometry (shape)the same as the VSEPR electron domain arrangement (electron domain geometry)?

The N-N bond in HNNH consists of ________.

The hybridization of the terminal carbons in the H2C C CH2 molecule is ________.

Of the molecules below, only ________ is nonpolar.

Of the following molecules, only ________ is polar.

The carbon-carbon σ bond in ethylene, H2C CH2, results from the overlap of ________.

Using the VSEPR model, the molecular geometry of the central atom in SO3 is ________.

The bond order of a homonuclear diatomic molecule can be decreased by ________.

There is/are ________ hybridized s atomic orbital(s)in ansp2-hybridized carbon atom.

The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________.

The sp2 atomic hybrid orbital set accommodates ________ electron domains.

Of the molecules below, only ________ is nonpolar.

There are ________ σ and ________ π bonds in the H-C≡C-H molecule.

A molecule has the formula AB3 and the central atom is in a different plane from the surrounding three atoms. Its molecular shape is ________.

The central atom in a certain molecule has 4 nonbonded electron pairs and 2 bonded electron pairs in its valence shell. The molecular geometry of this molecule is ________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

Based on molecular orbital theory, the bond orders of the H-H bonds in H₂, H₂⁺, and H₂^- are ________, respectively

________ hybrid orbitals are used for bonding by Xe in the XeF₄ molecule.

In order to produce sp²hybrid orbitals, s atomic orbital(s)and p atomic orbital(s)must be mixed.

A typical triple bond consists of __ sigma bond(s)and pi bond(s).

Based on molecular orbital theory, the bond order of the Be-Be bond in the Be₂ molecule is ________.

Consider the following species when answering the following questions: (i) PCl₃ (ii) CCl₄ (iii) TeCl₄ (iv) XeF₄ (v) SF₆ -For which of the molecules is the molecular geometry (shape)the same as the VSEPR electron domain arrangement (electron domain geometry)?

The hybridization of the terminal carbons in the H₂C C CH₂molecule is ________.

The carbon-carbon σ bond in ethylene, H₂C CH₂, results from the overlap of ________.

Using the VSEPR model, the molecular geometry of the central atom in SO₃ is ________.

There is/are ________ hybridized s atomic orbital(s)in ansp²-hybridized carbon atom.

The sp² atomic hybrid orbital set accommodates ________ electron domains.

There are σ and π bonds in the H-C≡C-H molecule.

A molecule has the formula AB₃ and the central atom is in a different plane from the surrounding three atoms. Its molecular shape is ________.