Question 1

The bond order of any molecule containing equal numbers of bonding and antibonding electrons is __________.

Accepted Answer

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

Question 2

The F-N-F bond angle in the NF3 molecule 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 3

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 4

The central iodine atom in the ICl4- ion has __________ nonbonded electron pairs and __________ bonded electron pairs in its valence shell.

Accepted Answer

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

Question 5

Based on molecular orbital theory, there are __________ unpaired electrons in the OF+ ion.

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 6

The molecular geometry of the H3O+ ion is __________.

Accepted Answer

A) linear 
B) tetrahedral 
C) bent 
D) trigonal pyramidal 
E) octahedral 
A) linear 
B) tetrahedral 
C) bent 
D) trigonal pyramidal 
E) octahedral

Question 7

The π bond in ethylene, H2C-CH2, results from the overlap of __________.

Accepted Answer

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

Question 8

The hybridization of the carbon atom labeled x in the molecule below 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

Using the VSEPR model, the molecular geometry of the central atom in NCl3 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 10

Using the VSEPR model, the molecular geometry of the central atom in CF4 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 11

A typical double bond consists of __________.

Accepted Answer

A) three sigma bonds 
B) three pi bonds 
C) one sigma and two pi bonds 
D) one sigma and one pi bond 
E) three ionic bonds 
A) three sigma bonds 
B) three pi bonds 
C) one sigma and two pi bonds 
D) one sigma and one pi bond 
E) three ionic bonds

Question 12

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 13

The central Xe atom in the XeF4 molecule has __________ unbonded electron pairs and __________ bonded electron pairs in its valence shell.

Accepted Answer

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

Question 14

According to MO theory, overlap of two p atomic orbitals produces __________.

Accepted Answer

A) one π MO and one σ* MO 
B) one π MO and one σ MO 
C) one π MO and one π* MO or one σ MO and one σ* MO 
D) one π+ MO and one σ* MO 
E) two π MOs, two π+ MOs, one σ MO, and one σ* MO 
A) one π MO and one σ* MO 
B) one π MO and one σ MO 
C) one π MO and one π* MO or one σ MO and one σ* MO 
D) one π+ MO and one σ* MO 
E) two π MOs, two π+ MOs, one σ MO, and one σ* MO

Question 15

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

Accepted Answer

A) 7 
B) 6 
C) 2 
D) 1 
E) 0 
A) 7 
B) 6 
C) 2 
D) 1 
E) 0

Question 16

Using the VSEPR model, the electron-domain geometry of the central atom in BF3 is __________.

Accepted Answer

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

Question 17

The 1s hydrogen orbital overlaps with the __________ iodine orbital in HI.

Accepted Answer

The answer of The 1s hydrogen orbital overlaps with the...

Question 18

Three monosulfur fluorides are observed: SF2, SF4, and SF6. Of these, __________ is/are polar.

Accepted Answer

A) SF2 only 
B) SF2 and SF4 only 
C) SF4 only 
D) SF6 only 
E) SF2, SF4, and SF6 
A) SF2 only 
B) SF2 and SF4 only 
C) SF4 only 
D) SF6 only 
E) SF2, SF4, and SF6

Question 19

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 20

In a typical multiple bond, the σ bond results from overlap of __________ orbitals and the π bond(s)result from overlap of __________ orbitals.

Accepted Answer

A) hybrid, atomic 
B) hybrid, hybrid 
C) atomic, hybrid 
D) hybrid, hybrid or atomic 
E) hybrid or atomic, hybrid or atomic 
A) hybrid, atomic 
B) hybrid, hybrid 
C) atomic, hybrid 
D) hybrid, hybrid or atomic 
E) hybrid or atomic, hybrid or atomic

Exam 9: Molecular Geometry and Bonding Theories

The bond order of any molecule containing equal numbers of bonding and antibonding electrons is __________.

The F-N-F bond angle in the NF3 molecule is slightly less than __________.

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

The central iodine atom in the ICl4- ion has __________ nonbonded electron pairs and __________ bonded electron pairs in its valence shell.

Based on molecular orbital theory, there are __________ unpaired electrons in the OF+ ion.

The molecular geometry of the H3O+ ion is __________.

The π bond in ethylene, H2C-CH2, results from the overlap of __________.

The hybridization of the carbon atom labeled x in the molecule below is __________.

Using the VSEPR model, the molecular geometry of the central atom in NCl3 is __________.

Using the VSEPR model, the molecular geometry of the central atom in CF4 is __________.

A typical double bond consists of __________.

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

The central Xe atom in the XeF4 molecule has __________ unbonded electron pairs and __________ bonded electron pairs in its valence shell.

According to MO theory, overlap of two p atomic orbitals produces __________.

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

Using the VSEPR model, the electron-domain geometry of the central atom in BF3 is __________.

The 1s hydrogen orbital overlaps with the __________ iodine orbital in HI.

Three monosulfur fluorides are observed: SF2, SF4, and SF6. Of these, __________ is/are polar.

Which of the molecules has a see-saw shape?

In a typical multiple bond, the σ bond results from overlap of __________ orbitals and the π bond(s)result from overlap of __________ orbitals.

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 F-N-F bond angle in the NF₃ molecule is slightly less than __________.

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

The central iodine atom in the ICl₄^- ion has nonbonded electron pairs and bonded electron pairs in its valence shell.

Based on molecular orbital theory, there are __________ unpaired electrons in the OF⁺ ion.

The molecular geometry of the H_3O⁺ ion is __________.

The π bond in ethylene, H₂C-CH₂, results from the overlap of __________.

Using the VSEPR model, the molecular geometry of the central atom in NCl₃ is __________.

Using the VSEPR model, the molecular geometry of the central atom in CF₄ is __________.

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

The central Xe atom in the XeF₄ molecule has unbonded electron pairs and bonded electron pairs in its valence shell.

Using the VSEPR model, the electron-domain geometry of the central atom in BF₃ is __________.

Three monosulfur fluorides are observed: SF₂, SF₄, and SF₆. Of these, __________ is/are polar.

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