Question 1

What is the molecular shape of carbon and nitrogen in methylamine (CH5N)?

Accepted Answer

A)  Nitrogen is trigonal planar and carbon is tetrahedral. 
B)  Carbon is tetrahedral and nitrogen is bent. 
C)  Nitrogen is trigonal pyramidal and carbon is tetrahedral. 
D)  Carbon is linear and nitrogen is tetrahedral. 
E)  Both of them are tetrahedral. 
A)  Nitrogen is trigonal planar and carbon is tetrahedral. 
B)  Carbon is tetrahedral and nitrogen is bent. 
C)  Nitrogen is trigonal pyramidal and carbon is tetrahedral. 
D)  Carbon is linear and nitrogen is tetrahedral. 
E)  Both of them are tetrahedral.

Question 2

What is the electron geometry of dichloromethane (CH2Cl2)?

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 3

Which of these structures represent ionic compounds?

Accepted Answer

A)  I and III 
B)  I and IV 
C)  IV and V 
D)  II and IV 
E)  I and V 
A)  I and III 
B)  I and IV 
C)  IV and V 
D)  II and IV 
E)  I and V

Question 4

This is a _______ model of a molecule.

Accepted Answer

A)  ball-and-stick 
B)  space-filling 
C)  Lewis 
D)  wire frame 
E)  tube 
A)  ball-and-stick 
B)  space-filling 
C)  Lewis 
D)  wire frame 
E)  tube

Question 5

In addition to single bonds, which of the following electron groups do the carbons in ethylene (C2H4) have?

Accepted Answer

A)  a double bond 
B)  a triple bond 
C)  a single electron 
D)  a lone pair of electrons 
E)  None of the above 
A)  a double bond 
B)  a triple bond 
C)  a single electron 
D)  a lone pair of electrons 
E)  None of the above

Question 6

Which of the following figures best illustrates how two molecules of formaldehyde (CH2O) interact?

Accepted Answer

A)   
B)   
C)   
D)   
E)   
A)   
B)   
C)   
D)   
E)

Question 7

Select the statement that best differentiates between bonding and nonbonding electrons.

Accepted Answer

A)  There are always more bonding electrons than lone pairs in a molecule. 
B)  Nonbonding electrons are less chemically important than bonding electrons. 
C)  Nonbonding electrons do not count toward an atom's octet of electrons. 
D)  Bonding electrons are shared and nonbonding electrons are not shared. 
E)  The more nonbonding electrons that an atom has, the more unstable the atom. 
A)  There are always more bonding electrons than lone pairs in a molecule. 
B)  Nonbonding electrons are less chemically important than bonding electrons. 
C)  Nonbonding electrons do not count toward an atom's octet of electrons. 
D)  Bonding electrons are shared and nonbonding electrons are not shared. 
E)  The more nonbonding electrons that an atom has, the more unstable the atom.

Question 8

Below are two charged particles. What will they do when in close proximity to one another?

Accepted Answer

A)  They will do nothing. 
B)  The particle on the left will transfer its positive charge to the particle on the right. 
C)  The particle on the right will transfer its negative charge to the particle on the left. 
D)  They will attract one another. 
E)  They will repel one another. 
A)  They will do nothing. 
B)  The particle on the left will transfer its positive charge to the particle on the right. 
C)  The particle on the right will transfer its negative charge to the particle on the left. 
D)  They will attract one another. 
E)  They will repel one another.

Question 9

In general, how many bonds does a nonmetal in the second period 2 form?

Accepted Answer

A)  the same number as the number of nonbonding electrons in the atom 
B)  the same number as the number of unpaired electrons in the atom 
C)  the same number as the total number of electrons in the atom 
D)  eight, in accordance with the octet rule 
E)  It is impossible to predict the number. 
A)  the same number as the number of nonbonding electrons in the atom 
B)  the same number as the number of unpaired electrons in the atom 
C)  the same number as the total number of electrons in the atom 
D)  eight, in accordance with the octet rule 
E)  It is impossible to predict the number.

Question 10

Which statement best describes the difference between electron geometry and molecular shape?

Accepted Answer

A)  There is no real difference between these terms. 
B)  Electron geometry is two dimensional, whereas molecule shapes are three dimensional. 
C)  Electron geometry is theoretical, whereas molecular shape is real. 
D)  Electron geometry refers to the arrangement of electrons around a central atom, whereas molecular shape refers to the arrangement of atoms. 
E)  Answers b, c, and d are all true. 
A)  There is no real difference between these terms. 
B)  Electron geometry is two dimensional, whereas molecule shapes are three dimensional. 
C)  Electron geometry is theoretical, whereas molecular shape is real. 
D)  Electron geometry refers to the arrangement of electrons around a central atom, whereas molecular shape refers to the arrangement of atoms. 
E)  Answers b, c, and d are all true.

Question 11

What is the strongest type of intermolecular interaction attracting molecules of propane together?

Accepted Answer

A)  ionic bonding 
B)  covalent bonding 
C)  dispersion forces 
D)  dipole-dipole forces 
E)  hydrogen bonding forces 
A)  ionic bonding 
B)  covalent bonding 
C)  dispersion forces 
D)  dipole-dipole forces 
E)  hydrogen bonding forces

Question 12

Below are four molecules and compounds. Choose the statement below that best describes these four.

Accepted Answer

A)  All of these are ionic compounds. 
B)  I and II are covalent molecules, whereas III and IV are ionic. 
C)  II and III are ionic, whereas I and IV are covalent. 
D)  I, III, and IV and covalent, whereas II is ionic. 
E)  All of these are covalent molecules. 
A)  All of these are ionic compounds. 
B)  I and II are covalent molecules, whereas III and IV are ionic. 
C)  II and III are ionic, whereas I and IV are covalent. 
D)  I, III, and IV and covalent, whereas II is ionic. 
E)  All of these are covalent molecules.

Question 13

Which of the following best describes your reasoning in answering the previous question?

Accepted Answer

A)  Ethanol is nonpolar. 
B)  Ethanol has polar bonds. 
C)  Ethanol contains an O-H bond. 
D)  Ethanol forms ions in solutions. 
E)  Ethanol does not contain any metals. 
A)  Ethanol is nonpolar. 
B)  Ethanol has polar bonds. 
C)  Ethanol contains an O-H bond. 
D)  Ethanol forms ions in solutions. 
E)  Ethanol does not contain any metals.

Question 14

What is the strongest type of intermolecular force that a caffeine molecule could form with other caffeine molecules?

Accepted Answer

A)  dispersion forces 
B)  nonpolar covalent bonds 
C)  hydrogen bonds 
D)  covalent bonds 
E)  dipole-dipole interactions 
A)  dispersion forces 
B)  nonpolar covalent bonds 
C)  hydrogen bonds 
D)  covalent bonds 
E)  dipole-dipole interactions

Question 15

What is the molecular shape of the carbon in formaldehyde, shown below?

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 16

What is the electronic geometry of the nitrogen indicated with arrow II?

Accepted Answer

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

Question 17

How is estradiol recognized by the estrogen receptor?

Accepted Answer

A)  The molecular weight is recognized. 
B)  The atom types in the ligands are recognized by the receptors. 
C)  Single bonds, double bonds, and triple bonds are recognized by receptors. 
D)  Receptors recognize ligands by shape only. 
E)  Ligands are recognized by shape and intermolecular forces. 
A)  The molecular weight is recognized. 
B)  The atom types in the ligands are recognized by the receptors. 
C)  Single bonds, double bonds, and triple bonds are recognized by receptors. 
D)  Receptors recognize ligands by shape only. 
E)  Ligands are recognized by shape and intermolecular forces.

Question 18

What is the molecular shape of the oxygen in methanol, shown below?

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 19

An atom in a molecule has a trigonal planar molecular shape and a formula of MX3. What is the angle between the atoms in this molecule?

Accepted Answer

A)  360º 
B)  180º 
C)  120º 
D)  109.5º 
E)  90º 
A)  360º 
B)  180º 
C)  120º 
D)  109.5º 
E)  90º

Question 20

What feature of a molecule is illustrated by the ball-and-stick model of ethane on the left that is not illustrated by the Lewis dot structure on the right?

Accepted Answer

A)  Nothing, these models illustrate the same thing. 
B)  the bonds 
C)  the types of atoms 
D)  the three-dimensional shape of the molecule 
E)  the core electrons 
A)  Nothing, these models illustrate the same thing. 
B)  the bonds 
C)  the types of atoms 
D)  the three-dimensional shape of the molecule 
E)  the core electrons

What is the molecular shape of carbon and nitrogen in methylamine (CH₅N)?

What is the electron geometry of dichloromethane (CH₂Cl₂)?

Which of these structures represent ionic compounds?

This is a _______ model of a molecule.

In addition to single bonds, which of the following electron groups do the carbons in ethylene (C₂H₄) have?

Which of the following figures best illustrates how two molecules of formaldehyde (CH₂O) interact?

Select the statement that best differentiates between bonding and nonbonding electrons.

Below are two charged particles. What will they do when in close proximity to one another?

In general, how many bonds does a nonmetal in the second period 2 form?

Which statement best describes the difference between electron geometry and molecular shape?

What is the strongest type of intermolecular interaction attracting molecules of propane together?

Below are four molecules and compounds. Choose the statement below that best describes these four.

Which of the following best describes your reasoning in answering the previous question?

What is the strongest type of intermolecular force that a caffeine molecule could form with other caffeine molecules?

What is the molecular shape of the carbon in formaldehyde, shown below?

What is the electronic geometry of the nitrogen indicated with arrow II?

How is estradiol recognized by the estrogen receptor?

What is the molecular shape of the oxygen in methanol, shown below?

An atom in a molecule has a trigonal planar molecular shape and a formula of MX₃. What is the angle between the atoms in this molecule?

What feature of a molecule is illustrated by the ball-and-stick model of ethane on the left that is not illustrated by the Lewis dot structure on the right?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 3: Compounds and Molecules

What is the molecular shape of carbon and nitrogen in methylamine (CH5N)?

What is the electron geometry of dichloromethane (CH2Cl2)?

Which of these structures represent ionic compounds?

This is a _______ model of a molecule.

In addition to single bonds, which of the following electron groups do the carbons in ethylene (C2H4) have?

Which of the following figures best illustrates how two molecules of formaldehyde (CH2O) interact?

Select the statement that best differentiates between bonding and nonbonding electrons.

Below are two charged particles. What will they do when in close proximity to one another?

In general, how many bonds does a nonmetal in the second period 2 form?

Which statement best describes the difference between electron geometry and molecular shape?

What is the strongest type of intermolecular interaction attracting molecules of propane together?

Below are four molecules and compounds. Choose the statement below that best describes these four.

Which of the following best describes your reasoning in answering the previous question?

What is the strongest type of intermolecular force that a caffeine molecule could form with other caffeine molecules?

What is the molecular shape of the carbon in formaldehyde, shown below?

What is the electronic geometry of the nitrogen indicated with arrow II?

How is estradiol recognized by the estrogen receptor?

What is the molecular shape of the oxygen in methanol, shown below?

An atom in a molecule has a trigonal planar molecular shape and a formula of MX3. What is the angle between the atoms in this molecule?

What feature of a molecule is illustrated by the ball-and-stick model of ethane on the left that is not illustrated by the Lewis dot structure on the right?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

What is the molecular shape of carbon and nitrogen in methylamine (CH₅N)?

What is the electron geometry of dichloromethane (CH₂Cl₂)?

In addition to single bonds, which of the following electron groups do the carbons in ethylene (C₂H₄) have?

Which of the following figures best illustrates how two molecules of formaldehyde (CH₂O) interact?

An atom in a molecule has a trigonal planar molecular shape and a formula of MX₃. What is the angle between the atoms in this molecule?