Question 1

Which is the most reasonable prediction for the H-C-H bond angle in CH4?

Accepted Answer

A)  90° 
B)  109.5° 
C)  120° 
D)  107° 
E)  105° 
A)  90° 
B)  109.5° 
C)  120° 
D)  107° 
E)  105°

Question 2

For different structural arrangements of atoms having the formula XeF2Cl2, which structures represent polar molecules? (Black = Xe, Yellow = F, Green = Cl)

Accepted Answer

A)  I and III 
B)  II only 
C)  I, II and III 
D)  II and III 
E)  None of these structures are polar. 
A)  I and III 
B)  II only 
C)  I, II and III 
D)  II and III 
E)  None of these structures are polar.

Question 3

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

Accepted Answer

A)  tetrahedral 
B)  trigonal pyramidal 
C)  trigonal planar 
D)  square planar 
E)  seesaw 
A)  tetrahedral 
B)  trigonal pyramidal 
C)  trigonal planar 
D)  square planar 
E)  seesaw

Question 4

What is the predicted molecular geometry of the H2O molecule according to the VSEPR model?

Accepted Answer

A)  tetrahedral 
B)  trigonal pyramidal 
C)  bent 
D)  square planar 
E)  seesaw 
A)  tetrahedral 
B)  trigonal pyramidal 
C)  bent 
D)  square planar 
E)  seesaw

Question 5

Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

Accepted Answer

A) True 
 B)False

Question 6

According to the VSEPR model, the predicted molecular geometry of SiCl4 is

Accepted Answer

A)  linear. 
B)  trigonal planar. 
C)  bent. 
D)  tetrahedral. 
E)  trigonal pyramidal. 
A)  linear. 
B)  trigonal planar. 
C)  bent. 
D)  tetrahedral. 
E)  trigonal pyramidal.

Question 7

Using the VSEPR model, predict the molecular geometry around the central atom in SO32-.

Accepted Answer

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

Question 8

A molecule with the formula AB4 and a square planar molecular geometry uses ________ to form its σ bonds.

Accepted Answer

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

Question 9

What is the molecular geometry of NOCl as predicted by the VSEPR model?

Accepted Answer

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

Question 10

According to the VSEPR model, a molecule with the general formula AB2 with two lone pairs on the central atom will have a ________ molecular geometry.

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  seesaw 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  seesaw

Question 11

What is the molecular geometry of ClO3F as predicted by the VSEPR model?

Accepted Answer

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

Question 12

According to the VSEPR model, which molecule is predicted to be linear?

Accepted Answer

A)  H2S 
B)  HCN 
C)  BF3 
D)  H2CO 
E)  SO3 
A)  H2S 
B)  HCN 
C)  BF3 
D)  H2CO 
E)  SO3

Question 13

The bond angles in the H3O+ ion are

Accepted Answer

A)  120°. 
B)  90°, 120°. 
C)  109°. 
D)  90°. 
E)  180°. 
A)  120°. 
B)  90°, 120°. 
C)  109°. 
D)  90°. 
E)  180°.

Question 14

Which one of the following molecules is nonpolar?

Accepted Answer

A)  NH3 
B)  OF2 
C)  CH3Cl 
D)  H2O 
E)  BeCl2 
A)  NH3 
B)  OF2 
C)  CH3Cl 
D)  H2O 
E)  BeCl2

Question 15

In the valence bond treatment, overlap of an s orbital on one atom with an sp3 orbital on another atom gives rise to a σ bond.

Accepted Answer

A) True 
 B)False

Question 16

In one sentence state how molecular orbitals are usually obtained.

Accepted Answer

Molecular orbitals are obtaine

Question 17

A molecule with the formula AB4 and a tetrahedral molecular geometry uses ________ to form its σ bonds.

Accepted Answer

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

Question 18

When molecules that exhibit separation of charges are placed in an electric field, they become oriented positive end to negative plate and negative end to positive plate.

Accepted Answer

A) True 
 B)False

Question 19

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry, such as XeBr4?

Accepted Answer

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

Question 20

What is the hybridization on the central atom in NO3-?

Accepted Answer

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

Exam 9: Chemical Bonding II: Molecular Geometry and Bonding Theories

Which is the most reasonable prediction for the H-C-H bond angle in CH4?

For different structural arrangements of atoms having the formula XeF2Cl2, which structures represent polar molecules? (Black = Xe, Yellow = F, Green = Cl)

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

What is the predicted molecular geometry of the H2O molecule according to the VSEPR model?

Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

According to the VSEPR model, the predicted molecular geometry of SiCl4 is

Using the VSEPR model, predict the molecular geometry around the central atom in SO32-.

A molecule with the formula AB4 and a square planar molecular geometry uses ________ to form its σ bonds.

What is the molecular geometry of NOCl as predicted by the VSEPR model?

According to the VSEPR model, a molecule with the general formula AB2 with two lone pairs on the central atom will have a ________ molecular geometry.

What is the molecular geometry of ClO3F as predicted by the VSEPR model?

According to the VSEPR model, which molecule is predicted to be linear?

The bond angles in the H3O+ ion are

Which one of the following molecules is nonpolar?

In the valence bond treatment, overlap of an s orbital on one atom with an sp3 orbital on another atom gives rise to a σ bond.

In one sentence state how molecular orbitals are usually obtained.

A molecule with the formula AB4 and a tetrahedral molecular geometry uses ________ to form its σ bonds.

When molecules that exhibit separation of charges are placed in an electric field, they become oriented positive end to negative plate and negative end to positive plate.

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry, such as XeBr4?

What is the hybridization on the central atom in NO3-?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

Which is the most reasonable prediction for the H-C-H bond angle in CH₄?

For different structural arrangements of atoms having the formula XeF₂Cl₂, which structures represent polar molecules? (Black = Xe, Yellow = F, Green = Cl)

What is the predicted molecular geometry of the CH₄ molecule according to the VSEPR model?

What is the predicted molecular geometry of the H₂O molecule according to the VSEPR model?

According to the VSEPR model, the predicted molecular geometry of SiCl₄ is

Using the VSEPR model, predict the molecular geometry around the central atom in SO₃^2-.

A molecule with the formula AB₄ and a square planar molecular geometry uses ________ to form its σ bonds.

According to the VSEPR model, a molecule with the general formula AB₂ with two lone pairs on the central atom will have a ________ molecular geometry.

What is the molecular geometry of ClO₃F as predicted by the VSEPR model?

The bond angles in the H₃O⁺ ion are

In the valence bond treatment, overlap of an s orbital on one atom with an sp³ orbital on another atom gives rise to a σ bond.

A molecule with the formula AB₄ and a tetrahedral molecular geometry uses ________ to form its σ bonds.

What is the total number of electron domains around the central atom for a molecule having a square planar molecular geometry, such as XeBr₄?

What is the hybridization on the central atom in NO₃^-?