Question 1

The hybridization scheme for BeF2 is ________.

Accepted Answer

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

Question 2

Valence bond theory does not address the issue of ________.

Accepted Answer

A) excited states of molecules 
B) molecular shape 
C) covalent bonding 
D) hybridization 
E) multiple bonds 
A) excited states of molecules 
B) molecular shape 
C) covalent bonding 
D) hybridization 
E) multiple bonds

Question 3

There are ________ σ bonds and ________ π bonds in H3C-CH2-CH   CH-CH2-C   CH.

Accepted Answer

A) 14, 2 
B) 10, 3 
C) 12, 2 
D) 13, 2 
E) 16, 3 
A) 14, 2 
B) 10, 3 
C) 12, 2 
D) 13, 2 
E) 16, 3

Question 4

The electron-domain geometry of a boron-centered compound BH3 is trigonal planar. The hybridization of the central boron atom is ________.

Accepted Answer

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

Question 5

The hybridizations of iodine in IF3 and IF5 are ________ and ________, respectively.

Accepted Answer

A) sp3, sp3d 
B) sp3d, sp3d2 
C) sp3d, sp3 
D) sp3d2, sp3d 
E) sp3d2, sp3d2 
A) sp3, sp3d 
B) sp3d, sp3d2 
C) sp3d, sp3 
D) sp3d2, sp3d 
E) sp3d2, sp3d2

Question 6

The more effectively two atomic orbitals overlap, ________.

Accepted Answer

A) the more bonding MOs will be produced by the combination 
B) the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO 
C) the higher will be the energies of both bonding and antibonding MOs that result 
D) the fewer antibonding MOs will be produced by the combination 
E) the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO 
A) the more bonding MOs will be produced by the combination 
B) the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO 
C) the higher will be the energies of both bonding and antibonding MOs that result 
D) the fewer antibonding MOs will be produced by the combination 
E) the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO

Question 7

Consider the following species when answering the following questions:
(i) PClS1U1B13S1U1B0 
(ii) CClS1U1B14S1U1B0 
(iii) TeClS1U1B14S1U1B0 
(iv) XeFS1U1B14S1U1B0 
(v) SFS1U1B16S1U1B0
-In which of the molecules is the central atom sp3d2 hybridized?

Accepted Answer

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

Question 8

Electrons in ________ bonds remain localized between two atoms. Electrons in ________ bonds can become delocalized between more than two atoms.

Accepted Answer

A) pi, sigma 
B) sigma, pi 
C) pi, pi 
D) sigma, sigma 
E) ionic, sigma 
A) pi, sigma 
B) sigma, pi 
C) pi, pi 
D) sigma, sigma 
E) ionic, sigma

Question 9

The O-S-O bond angle in SO2 is slightly less than ________.

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) 60° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
E) 60°

Question 10

The central atom in the ICl4- ion has ________ nonbonded electron pair(s)and ________ bonded electron pair(s)in its valence shell.

Accepted Answer

A) 4, 2 
B) 0, 4 
C) 2, 4 
D) 2, 2 
E) 6, 0 
A) 4, 2 
B) 0, 4 
C) 2, 4 
D) 2, 2 
E) 6, 0

Question 11

The bond angles in a tetrahedral molecule are ________ degrees.

Accepted Answer

A) 109.5 
B) 120 
C) 90 
D) 45 
E) <45 
A) 109.5 
B) 120 
C) 90 
D) 45 
E) <45

Question 12

The quantitative amount of charge separation in a diatomic molecule contributes to the dipole moment of that molecule.

Accepted Answer

A) True 
 B)False

Question 13

There are ________ σ and ________ π bonds in the H2C=C=CH2 molecule.

Accepted Answer

A) 4, 2 
B) 6, 4 
C) 2, 2 
D) 2, 6 
E) 6, 2 
A) 4, 2 
B) 6, 4 
C) 2, 2 
D) 2, 6 
E) 6, 2

Question 14

Of the molecules below, only ________ is polar.

Accepted Answer

A) CO2 
B) CH4 
C) PF5 
D) SnF3 
E) H2 
A) CO2 
B) CH4 
C) PF5 
D) SnF3 
E) H2

Question 15

There are ________ σ and ________ π bond(s)in the H2C=CH2 molecule.

Accepted Answer

A) 3 and 2 
B) 3 and 4 
C) 4 and 3 
D) 2 and 3 
E) 5 and 1 
A) 3 and 2 
B) 3 and 4 
C) 4 and 3 
D) 2 and 3 
E) 5 and 1

Question 16

Hybridization is the process of mixing atomic orbitals as atoms approach each other to form a bond.

Accepted Answer

A) True 
 B)False

Question 17

Structural changes around a double bond in the ________ portion of the rhodopsin molecule trigger the chemical reactions that result in vision.

Accepted Answer

A) protein 
B) opsin 
C) retinal 
D) cones 
E) rods 
A) protein 
B) opsin 
C) retinal 
D) cones 
E) rods

Question 18

Based on molecular orbital theory, the bond order of the N-N bond in the N22+ ion is ________.

Accepted Answer

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

Question 19

In order to exhibit delocalized π bonding, a molecule must have ________.

Accepted Answer

A) at least two π bonds 
B) at least two resonance structures 
C) at least three σ bonds 
D) at least four atoms 
E) trigonal planar electron domain geometry 
A) at least two π bonds 
B) at least two resonance structures 
C) at least three σ bonds 
D) at least four atoms 
E) trigonal planar electron domain geometry

Question 20

Consider the following species when answering the following questions:
(i) PClS1U1B13S1U1B0 (ii) CClS1U1B14S1U1B0 (iii) TeClS1U1B14S1U1B0 (iv) XeFS1U1B14S1U1B0 (v) SFS1U1B16S1U1B0
-Which of the molecules has a see-saw shape?

Accepted Answer

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

Exam 9: Molecular Geometry and Bonding Theories

The hybridization scheme for BeF2 is ________.

Valence bond theory does not address the issue of ________.

There are ________ σ bonds and ________ π bonds in H3C-CH2-CH CH-CH2-C CH.

The electron-domain geometry of a boron-centered compound BH3 is trigonal planar. The hybridization of the central boron atom is ________.

The hybridizations of iodine in IF3 and IF5 are ________ and ________, respectively.

The more effectively two atomic orbitals overlap, ________.

Consider the following species when answering the following questions: (i) PCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 -In which of the molecules is the central atom sp3d2 hybridized?

Electrons in ________ bonds remain localized between two atoms. Electrons in ________ bonds can become delocalized between more than two atoms.

The O-S-O bond angle in SO2 is slightly less than ________.

The central atom in the ICl4- ion has ________ nonbonded electron pair(s)and ________ bonded electron pair(s)in its valence shell.

The bond angles in a tetrahedral molecule are ________ degrees.

The quantitative amount of charge separation in a diatomic molecule contributes to the dipole moment of that molecule.

There are ________ σ and ________ π bonds in the H2C=C=CH2 molecule.

Of the molecules below, only ________ is polar.

There are ________ σ and ________ π bond(s)in the H2C=CH2 molecule.

Hybridization is the process of mixing atomic orbitals as atoms approach each other to form a bond.

Structural changes around a double bond in the ________ portion of the rhodopsin molecule trigger the chemical reactions that result in vision.

Based on molecular orbital theory, the bond order of the N-N bond in the N22+ ion is ________.

In order to exhibit delocalized π bonding, a molecule must have ________.

Consider the following species when answering the following questions: (i) PCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 -Which of the molecules has a see-saw shape?

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

The hybridization scheme for BeF₂ is ________.

There are σ bonds and π bonds in H₃C-CH₂-CH CH-CH₂-C CH.

The electron-domain geometry of a boron-centered compound BH₃ is trigonal planar. The hybridization of the central boron atom is ________.

The hybridizations of iodine in IF₃and IF₅ are and , respectively.

Consider the following species when answering the following questions: (i) PCl₃ (ii) CCl₄ (iii) TeCl₄ (iv) XeF₄ (v) SF₆ -In which of the molecules is the central atom sp³d² hybridized?

Electrons in bonds remain localized between two atoms. Electrons in bonds can become delocalized between more than two atoms.

The O-S-O bond angle in SO₂ is slightly less than ________.

The central atom in the ICl₄^- ion has nonbonded electron pair(s)and bonded electron pair(s)in its valence shell.

There are σ and π bonds in the H₂C=C=CH₂ molecule.

There are σ and π bond(s)in the H₂C=CH₂ molecule.

Based on molecular orbital theory, the bond order of the N-N bond in the N₂²⁺ ion is ________.

Consider the following species when answering the following questions: (i) PCl₃ (ii) CCl₄ (iii) TeCl₄ (iv) XeF₄ (v) SF₆ -Which of the molecules has a see-saw shape?