Question 1

According to valence bond theory,which orbitals overlap in the formation of the bond in HCl?

Accepted Answer

A) 1s on H and 2p on Cl 
B) 2s on H and 3p on Cl 
C) 1s on H and 3s on Cl 
D) 1s on H and 3p on Cl 
E) 1s on H and 4p on Cl 
A) 1s on H and 2p on Cl 
B) 2s on H and 3p on Cl 
C) 1s on H and 3s on Cl 
D) 1s on H and 3p on Cl 
E) 1s on H and 4p on Cl

Question 2

The molecular geometry of the PHCl2 molecule is ________.

Accepted Answer

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

Question 3

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)

Question 4

The molecular geometry of the PF4+ ion is ________.

Accepted Answer

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

Question 5

What are the hybrid orbitals used for bonding by Xe in a XeCl4 molecule?

Accepted Answer

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

Question 6

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 7

Boron trifluoride has three bonding domains,and its electron domain geometry is trigonal planar.

Accepted Answer

A) True 
 B)False

Question 8

What is the hybridization of the I atom in a IF5 molecule?

Accepted Answer

A) sp2d2 
B) sp3d 
C) sp3 
D) sp3d2 
E) sp2 
A) sp2d2 
B) sp3d 
C) sp3 
D) sp3d2 
E) sp2

Question 9

According to valence bond theory,which orbitals overlap in the formation of the bond in   ?

Accepted Answer

A) 3s 
B) 3p 
C) 4s 
D) 4p 
E) 3d 
A) 3s 
B) 3p 
C) 4s 
D) 4p 
E) 3d

Question 10

For molecules with only one central atom,how many lone pairs on the central atom guarantees molecular polarity?

Accepted Answer

A) 1 
B) 2 
C) 1 or 2 
D) 3 
E) 1 or 3 
A) 1 
B) 2 
C) 1 or 2 
D) 3 
E) 1 or 3

Question 11

The F-B-F bond angle in the BF2- ion is approximately ________.

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 12

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 13

The H-C-H bond angle in the CH4 ion is approximately ________.

Accepted Answer

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

Question 14

The hybridization of carbon in the H-C   C-H molecule is ________.

Accepted Answer

A) sp2 
B) sp 
C) s2p 
D) s3p 
E) sp3 
A) sp2 
B) sp 
C) s2p 
D) s3p 
E) sp3

Question 15

There is/are ________ π bond(s)in the molecule below.

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 4 
E) 16 
A) 0 
B) 1 
C) 2 
D) 4 
E) 16

Question 16

In a C=C bond,the σ bond results from overlap of ________ orbitals and the π bond(s)result from overlap of ________ orbitals.

Accepted Answer

A) sp2-hybrid, p-atomic 
B) sp2-atomic, p-hybrid 
C) sp3-hybrid, p-atomic 
D) sp-hybrid, p-atomic 
E) σ-atomic, π-hybrid 
A) sp2-hybrid, p-atomic 
B) sp2-atomic, p-hybrid 
C) sp3-hybrid, p-atomic 
D) sp-hybrid, p-atomic 
E) σ-atomic, π-hybrid

Question 17

The highest energy occupied molecular orbital in the F-F bond of the F2 molecule is ________.

Accepted Answer

A) π*2s 
B) π2s 
C) σ*1p 
D) π*2p 
E) π2p 
A) π*2s 
B) π2s 
C) σ*1p 
D) π*2p 
E) π2p

Question 18

According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O22-?

Accepted Answer

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

Question 19

Using the VSEPR model,the molecular geometry of the central atom in KrF2 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 20

The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are ________ and ________,respectively. - :C ≡ O: +

Accepted Answer

A) sp, sp3 
B) sp2, sp3 
C) sp3, sp2 
D) sp, sp 
E) sp2, sp2 
A) sp, sp3 
B) sp2, sp3 
C) sp3, sp2 
D) sp, sp 
E) sp2, sp2

Exam 9: Molecular Geometry and Bonding Theories

According to valence bond theory,which orbitals overlap in the formation of the bond in HCl?

The molecular geometry of the PHCl2 molecule is ________.

Which of the molecules has a see-saw shape?

The molecular geometry of the PF4+ ion is ________.

What are the hybrid orbitals used for bonding by Xe in a XeCl4 molecule?

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

Boron trifluoride has three bonding domains,and its electron domain geometry is trigonal planar.

What is the hybridization of the I atom in a IF5 molecule?

According to valence bond theory,which orbitals overlap in the formation of the bond in ?

For molecules with only one central atom,how many lone pairs on the central atom guarantees molecular polarity?

The F-B-F bond angle in the BF2- ion is approximately ________.

The more effectively two atomic orbitals overlap,________.

The H-C-H bond angle in the CH4 ion is approximately ________.

The hybridization of carbon in the H-C C-H molecule is ________.

There is/are ________ π bond(s)in the molecule below.

In a C=C bond,the σ bond results from overlap of ________ orbitals and the π bond(s)result from overlap of ________ orbitals.

The highest energy occupied molecular orbital in the F-F bond of the F2 molecule is ________.

According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O22-?

Using the VSEPR model,the molecular geometry of the central atom in KrF2 is ________.

The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are ________ and ________,respectively. - :C ≡ O: +

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

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 molecular geometry of the PHCl₂ molecule is ________.

The molecular geometry of the PF₄⁺ ion is ________.

What are the hybrid orbitals used for bonding by Xe in a XeCl₄ molecule?

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

What is the hybridization of the I atom in a IF₅ molecule?

The F-B-F bond angle in the BF₂^- ion is approximately ________.

The H-C-H bond angle in the CH₄ ion is approximately ________.

In a C=C bond,the σ bond results from overlap of orbitals and the π bond(s)result from overlap of orbitals.

The highest energy occupied molecular orbital in the F-F bond of the F₂ molecule is ________.

According to molecular orbital theory,how many unpaired electrons are in a peroxide ion,O₂^2-?

Using the VSEPR model,the molecular geometry of the central atom in KrF₂ is ________.

The Lewis structure of carbon monoxide is given below.The hybridizations of the carbon and oxygen atoms in carbon monoxide are and ,respectively. ^-^:C ≡ O: ⁺