Question 1

Which figure BEST illustrates how two molecules of formaldehyde (CH2O)interact?

Accepted Answer

A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e 
A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e

Question 2

Which 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 3

Propane is a fuel commonly used in barbeques and to heat homes.It has the structure shown below.Does propane have a permanent dipole?

Accepted Answer

A)  Yes.The carbon is partially negative, and the hydrogen is partially positive. 
B)  Yes.The carbon is partially positive, and the hydrogen is partially negative. 
C)  Yes.One side of the molecule is always partially positive, and the other side is partially negative. 
D)  No.Propane has a temporary dipole. 
E)  No.Propane never displays any dipole at all. 
A)  Yes.The carbon is partially negative, and the hydrogen is partially positive. 
B)  Yes.The carbon is partially positive, and the hydrogen is partially negative. 
C)  Yes.One side of the molecule is always partially positive, and the other side is partially negative. 
D)  No.Propane has a temporary dipole. 
E)  No.Propane never displays any dipole at all.

Question 4

How does estradiol stimulate the growth of breast cancer cells?

Accepted Answer

A)  Estradiol is a toxin, and all toxins stimulate the growth and spread of cancer. 
B)  Estradiol is a damaged estrogen that stimulates the growth of damaged cell. 
C)  Estradiol binds to breast cancer cell receptors as well as receptors found in other parts of the body. 
D)  Once a woman reaches adulthood, estradiol has no purpose in the body and so it causes breast cancer. 
E)  All of the above statements about estradiol are true. 
A)  Estradiol is a toxin, and all toxins stimulate the growth and spread of cancer. 
B)  Estradiol is a damaged estrogen that stimulates the growth of damaged cell. 
C)  Estradiol binds to breast cancer cell receptors as well as receptors found in other parts of the body. 
D)  Once a woman reaches adulthood, estradiol has no purpose in the body and so it causes breast cancer. 
E)  All of the above statements about estradiol are true.

Question 5

Which of the following covalent compounds is polar?

Accepted Answer

A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  all of these molecules are polar. 
A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  all of these molecules are polar.

Question 6

Which of the following covalent bonds is polar?

Accepted Answer

A)  C-C 
B)  C-H 
C)  O-Cl 
D)  Cl-Cl 
E)  Mg-Cl 
A)  C-C 
B)  C-H 
C)  O-Cl 
D)  Cl-Cl 
E)  Mg-Cl

Question 7

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

Accepted Answer

A)  b only 
B)  a, b, and c 
C)  b, c, and e 
D)  a, b, c, and e 
E)  d only 
A)  b only 
B)  a, b, and c 
C)  b, c, and e 
D)  a, b, c, and e 
E)  d only

Question 8

How many atoms are bonded to the carbon in dichloromethane (CH2Cl2)?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 9

What is the purpose of Valence Shell Electron Pair Repulsion (VSEPR)theory?

Accepted Answer

A)  It predicts which atom is the central atom in a Lewis structure. 
B)  It identifies the lone pair and valence electrons in a molecule. 
C)  It determines the shape of a molecule from the Lewis structure. 
D)  It determines the shape of a molecule from a molecular model. 
E)  It determines the arrangement of valence electrons in an atom. 
A)  It predicts which atom is the central atom in a Lewis structure. 
B)  It identifies the lone pair and valence electrons in a molecule. 
C)  It determines the shape of a molecule from the Lewis structure. 
D)  It determines the shape of a molecule from a molecular model. 
E)  It determines the arrangement of valence electrons in an atom.

Question 10

What is the electron geometry of the carbon in 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 11

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

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 12

What is the angle between groups of electrons for an atom that has a trigonal planar electron geometry?

Accepted Answer

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

Question 13

Which of the bonds in the following molecule are polar covalent?

Accepted Answer

A)  C-H and O-H only 
B)  C-O and O-H only 
C)  C-O only 
D)  C-C and C-O 
E)  O-H only 
A)  C-H and O-H only 
B)  C-O and O-H only 
C)  C-O only 
D)  C-C and C-O 
E)  O-H only

Question 14

In addition to single bonds, which of the following electron groups are on the nitrogen of nitrogen trichloride (NCl3)?

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 electron groups are on the nitrogen. 
A)  a double bond 
B)  a triple bond 
C)  a single electron 
D)  a lone pair of electrons 
E)  None of the above electron groups are on the nitrogen.

Question 15

The electronegativity difference between K and Cl is ____, and therefore, the Mg-Cl bond is a(n)____ bond.

Accepted Answer

A)  2.2; polar covalent 
B)  -2.2; nonpolar covalent 
C)  3.8; ionic 
D)  -3.8; nonpolar covalent 
E)  2.2; ionic 
A)  2.2; polar covalent 
B)  -2.2; nonpolar covalent 
C)  3.8; ionic 
D)  -3.8; nonpolar covalent 
E)  2.2; ionic

Question 16

Which bonds in caffeine are polar covalent bonds?

Accepted Answer

A)  All the bonds are polar covalent. 
B)  the C-N bonds only 
C)  the C=C, C-C and C-H bonds 
D)  the C-N, C=O, and C=N bonds 
E)  the O-H bonds 
A)  All the bonds are polar covalent. 
B)  the C-N bonds only 
C)  the C=C, C-C and C-H bonds 
D)  the C-N, C=O, and C=N bonds 
E)  the O-H bonds

Question 17

Which bond is correctly labeled with a dipole arrow?

Accepted Answer

A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e 
A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e

Question 18

What is the electron geometry of the electron groups on the oxygen atom 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

What is the molecular geometry of the atoms bonded to the carbon atom indicated with arrow I in this structure of caffeine?

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 20

What is the molecular geometry 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

Which figure BEST illustrates how two molecules of formaldehyde (CH₂O)interact?

Which BEST describes your reasoning in answering the previous question?

Propane is a fuel commonly used in barbeques and to heat homes.It has the structure shown below.Does propane have a permanent dipole?

How does estradiol stimulate the growth of breast cancer cells?

Which of the following covalent compounds is polar?

Which of the following covalent bonds is polar?

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

How many atoms are bonded to the carbon in dichloromethane (CH₂Cl₂)?

What is the purpose of Valence Shell Electron Pair Repulsion (VSEPR)theory?

What is the electron geometry of the carbon in dichloromethane (CH₂Cl₂)?

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

What is the angle between groups of electrons for an atom that has a trigonal planar electron geometry?

Which of the bonds in the following molecule are polar covalent?

In addition to single bonds, which of the following electron groups are on the nitrogen of nitrogen trichloride (NCl₃)?

The electronegativity difference between K and Cl is , and therefore, the Mg-Cl bond is a(n) bond.

Which bonds in caffeine are polar covalent bonds?

Which bond is correctly labeled with a dipole arrow?

What is the electron geometry of the electron groups on the oxygen atom in methanol, shown below?

What is the molecular geometry of the atoms bonded to the carbon atom indicated with arrow I in this structure of caffeine?

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

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 4: Molecular Geometry, Polarity, and Intermolecular

Which figure BEST illustrates how two molecules of formaldehyde (CH2O)interact?

Which BEST describes your reasoning in answering the previous question?

Propane is a fuel commonly used in barbeques and to heat homes.It has the structure shown below.Does propane have a permanent dipole?

How does estradiol stimulate the growth of breast cancer cells?

Which of the following covalent compounds is polar?

Which of the following covalent bonds is polar?

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

How many atoms are bonded to the carbon in dichloromethane (CH2Cl2)?

What is the purpose of Valence Shell Electron Pair Repulsion (VSEPR)theory?

What is the electron geometry of the carbon in dichloromethane (CH2Cl2)?

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

What is the angle between groups of electrons for an atom that has a trigonal planar electron geometry?

Which of the bonds in the following molecule are polar covalent?

In addition to single bonds, which of the following electron groups are on the nitrogen of nitrogen trichloride (NCl3)?

The electronegativity difference between K and Cl is ____, and therefore, the Mg-Cl bond is a(n)____ bond.

Which bonds in caffeine are polar covalent bonds?

Which bond is correctly labeled with a dipole arrow?

What is the electron geometry of the electron groups on the oxygen atom in methanol, shown below?

What is the molecular geometry of the atoms bonded to the carbon atom indicated with arrow I in this structure of caffeine?

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

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Which figure BEST illustrates how two molecules of formaldehyde (CH₂O)interact?

How many atoms are bonded to the carbon in dichloromethane (CH₂Cl₂)?

What is the electron geometry of the carbon in dichloromethane (CH₂Cl₂)?

In addition to single bonds, which of the following electron groups are on the nitrogen of nitrogen trichloride (NCl₃)?

The electronegativity difference between K and Cl is , and therefore, the Mg-Cl bond is a(n) bond.