Question 1

Give the number of lone pairs around the central atom and the geometry of the ion ClO3-.

Accepted Answer

A) 0 lone pairs, trigonal 
B) 1 lone pair, bent 
C) 1 lone pair, trigonal pyramidal 
D) 2 lone pairs, T-shaped 
E) 2 lone pairs, trigonal 
A) 0 lone pairs, trigonal 
B) 1 lone pair, bent 
C) 1 lone pair, trigonal pyramidal 
D) 2 lone pairs, T-shaped 
E) 2 lone pairs, trigonal

Question 2

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic?

Accepted Answer

A) only Cl2 
B) Cl2+ and Cl2 
C) Cl2 and Cl2- 
D) Cl2+ and Cl2- 
E) all three are paramagnetic 
A) only Cl2 
B) Cl2+ and Cl2 
C) Cl2 and Cl2- 
D) Cl2+ and Cl2- 
E) all three are paramagnetic

Question 3

If a triatomic molecule is linear, then the hybridization of the central atom will be

Accepted Answer

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

Question 4

A homonuclear diatomic molecule is a molecule composed of three atoms of the same element.

Accepted Answer

A) True 
 B)False

Question 5

The C-N-O bond angle in nitromethane, CH3NO2, is expected to be approximately

Accepted Answer

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

Question 6

More energy is required to break a bond with an order of 3/2 than is required to break a bond of order 2.

Accepted Answer

A) True 
 B)False

Question 7

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 8

The number of pi bonds in the molecule below is

Accepted Answer

A) 2. 
B) 4. 
C) 6. 
D) 10. 
E) 15. 
A) 2. 
B) 4. 
C) 6. 
D) 10. 
E) 15.

Question 9

According to the VSEPR theory, the molecular geometry of boron trichloride 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 10

Which should have the longer bond, O2 or O2+?

Accepted Answer

Question 11

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of oxygen indicated by the arrow in the structure of ibuprofen 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

According to VSEPR theory, the geometry of the PH3 molecule is best described as

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 13

Which of the following correctly lists species in order of increasing bond length?

Accepted Answer

A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2 
A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2

Question 14

Indicate the number of $\pi$-bonds in N2H2.

Accepted Answer

The answer of Indicate the number of $\pi$-bonds in N2H2....

Question 15

Which should have the longer bond, B2 or B2- ?

Accepted Answer

Question 16

Use VSEPR theory to predict the geometry of the PCl3 molecule.

Accepted Answer

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

Question 17

The bond angles in CO32- are expected to be

Accepted Answer

A) a little less than 109.5°. 
B) 109.5°. 
C) a little less than 120°. 
D) 120°. 
E) a little more than 120°. 
A) a little less than 109.5°. 
B) 109.5°. 
C) a little less than 120°. 
D) 120°. 
E) a little more than 120°.

Question 18

According to the VSEPR theory, the geometry of the SO3 molecule is

Accepted Answer

A) pyramidal. 
B) tetrahedral. 
C) trigonal planar. 
D) distorted tetrahedron (seesaw). 
E) square planar. 
A) pyramidal. 
B) tetrahedral. 
C) trigonal planar. 
D) distorted tetrahedron (seesaw). 
E) square planar.

Question 19

Which one of the following molecules has tetrahedral geometry?

Accepted Answer

A) XeF4 
B) BF3 
C) AsF5 
D) CF4 
E) NH3 
A) XeF4 
B) BF3 
C) AsF5 
D) CF4 
E) NH3

Question 20

Explain why CO2 is nonpolar, but OCS is polar.

Accepted Answer

In CO₂ the two bond moments point in oppo

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

Give the number of lone pairs around the central atom and the geometry of the ion ClO3-.

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic?

If a triatomic molecule is linear, then the hybridization of the central atom will be

A homonuclear diatomic molecule is a molecule composed of three atoms of the same element.

The C-N-O bond angle in nitromethane, CH3NO2, is expected to be approximately

More energy is required to break a bond with an order of 3/2 than is required to break a bond of order 2.

Which one of the following molecules is nonpolar?

The number of pi bonds in the molecule below is

According to the VSEPR theory, the molecular geometry of boron trichloride is

Which should have the longer bond, O2 or O2+?

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of oxygen indicated by the arrow in the structure of ibuprofen shown below?

According to VSEPR theory, the geometry of the PH3 molecule is best described as

Which of the following correctly lists species in order of increasing bond length?

Indicate the number of π\piπ -bonds in N2H2.

Which should have the longer bond, B2 or B2- ?

Use VSEPR theory to predict the geometry of the PCl3 molecule.

The bond angles in CO32- are expected to be

According to the VSEPR theory, the geometry of the SO3 molecule is

Which one of the following molecules has tetrahedral geometry?

Explain why CO2 is nonpolar, but OCS is polar.

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

Give the number of lone pairs around the central atom and the geometry of the ion ClO₃^-.

Consider the species Cl₂⁺, Cl₂, and Cl₂^-. Which of these species will be paramagnetic?

The C-N-O bond angle in nitromethane, CH₃NO₂, is expected to be approximately

Which should have the longer bond, O₂ or O₂⁺?

According to VSEPR theory, the geometry of the PH₃ molecule is best described as

Indicate the number of $\pi$ -bonds in N₂H₂.

Which should have the longer bond, B₂ or B₂^-?

Use VSEPR theory to predict the geometry of the PCl₃ molecule.

The bond angles in CO₃^2- are expected to be

According to the VSEPR theory, the geometry of the SO₃ molecule is

Explain why CO₂ is nonpolar, but OCS is polar.