Question 1

Consider the species N2-, N2, and N2+. Which of these species will be paramagnetic?

Accepted Answer

A) N2 and N2- 
B) N2+ and N2 
C) N2+ and N2- 
D) only N2- 
E) none are paramagnetic 
A) N2 and N2- 
B) N2+ and N2 
C) N2+ and N2- 
D) only N2- 
E) none are paramagnetic

Question 2

What is the hybridization of the As atom in the AsF5 molecule?

Accepted Answer

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

Question 3

Predict the molecular geometry and polarity of the SO2 molecule.

Accepted Answer

A) linear, polar 
B) linear, nonpolar 
C) bent, polar 
D) bent, nonpolar 
E) None of the above. 
A) linear, polar 
B) linear, nonpolar 
C) bent, polar 
D) bent, nonpolar 
E) None of the above.

Question 4

What is the hybridization of As in the AsF4- ion?

Accepted Answer

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

Question 5

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

Accepted Answer

Question 6

The hybridization of the central nitrogen atom in the molecule N2O is

Accepted Answer

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

Question 7

Which of the following molecules should be polar?
a. CH3OH
b. H2O
c. CH3OCH3

Accepted Answer

All of the

Question 8

The number of pi bonds in the molecule below is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 5. 
E) 9. 
A) 1. 
B) 2. 
C) 3. 
D) 5. 
E) 9.

Question 9

The hybridization of B in the BF3 molecule is sp3.

Accepted Answer

A) True 
 B)False

Question 10

According to VSEPR theory, which one of the following molecules has tetrahedral geometry?

Accepted Answer

A) NH3 
B) CCl4 
C) CO2 
D) SF4 
E) PCl5 
A) NH3 
B) CCl4 
C) CO2 
D) SF4 
E) PCl5

Question 11

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

Accepted Answer

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

Question 12

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of the nitrogen atom in the structure of DEET shown below?

Accepted Answer

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

Question 13

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

Accepted Answer

A) 109.5°. 
B) 90° and 120°. 
C) 180°. 
D) < 109.5°. 
E) < 90° and < 120°. 
A) 109.5°. 
B) 90° and 120°. 
C) 180°. 
D) < 109.5°. 
E) < 90° and < 120°.

Question 14

Predict the geometry and polarity of the CS2 molecule.

Accepted Answer

A) linear, polar 
B) linear, nonpolar 
C) tetrahedral, nonpolar 
D) bent, nonpolar 
E) bent, polar 
A) linear, polar 
B) linear, nonpolar 
C) tetrahedral, nonpolar 
D) bent, nonpolar 
E) bent, polar

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

The F - S - F bond angles in SF6 are

Accepted Answer

A) 90° and 180°. 
B) 109.5°. 
C) 120°. 
D) 180°. 
E) 90° and 120°. 
A) 90° and 180°. 
B) 109.5°. 
C) 120°. 
D) 180°. 
E) 90° and 120°.

Question 17

Which one of the following molecules has a non-zero dipole moment?

Accepted Answer

A) BeCl2 
B) Br2 
C) BF3 
D) IBr 
E) CO2 
A) BeCl2 
B) Br2 
C) BF3 
D) IBr 
E) CO2

Question 18

Indicate the type of hybrid orbitals used by the central atom in PCl3.

Accepted Answer

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

Question 19

The number of pi bonds in the oxalate ion (C2O42-)is

Accepted Answer

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

Question 20

Predict the geometry around the central atom in SO42-.

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

Exam 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Consider the species N2-, N2, and N2+. Which of these species will be paramagnetic?

What is the hybridization of the As atom in the AsF5 molecule?

Predict the molecular geometry and polarity of the SO2 molecule.

What is the hybridization of As in the AsF4- ion?

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

The hybridization of the central nitrogen atom in the molecule N2O is

Which of the following molecules should be polar? a. CH3OH b. H2O c. CH3OCH3

The number of pi bonds in the molecule below is

The hybridization of B in the BF3 molecule is sp3.

According to VSEPR theory, which one of the following molecules has tetrahedral geometry?

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of the nitrogen atom in the structure of DEET shown below?

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

Predict the geometry and polarity of the CS2 molecule.

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

The F - S - F bond angles in SF6 are

Which one of the following molecules has a non-zero dipole moment?

Indicate the type of hybrid orbitals used by the central atom in PCl3.

The number of pi bonds in the oxalate ion (C2O42-)is

Predict the geometry around the central atom in SO42-.

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Consider the species N₂^-, N₂, and N₂⁺. Which of these species will be paramagnetic?

What is the hybridization of the As atom in the AsF₅ molecule?

Predict the molecular geometry and polarity of the SO₂ molecule.

What is the hybridization of As in the AsF₄^- ion?

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH₃, PH₃, AsH₃.

The hybridization of the central nitrogen atom in the molecule N₂O is

Which of the following molecules should be polar? a. CH₃OH b. H₂O c. CH₃OCH₃

The hybridization of B in the BF₃ molecule is sp³.

According to the VSEPR theory, the actual F -As -F bond angles in the AsF₄^- ion are predicted to be

Predict the geometry and polarity of the CS₂ molecule.

The F - S - F bond angles in SF₆ are

Indicate the type of hybrid orbitals used by the central atom in PCl₃.

The number of pi bonds in the oxalate ion (C₂O₄^2-)is

Predict the geometry around the central atom in SO₄^2-.