Question 1

What is the formula of the compound formed by barium and oxygen?

Accepted Answer

A)  Ba2O2 
B)  Ba2O 
C)  BaO2 
D)  BaO 
A)  Ba2O2 
B)  Ba2O 
C)  BaO2 
D)  BaO

Question 2

The following represents carbonic acid, an important part of the buffer system in blood.   How many single covalent bonds are represented in this structure?

Accepted Answer

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

Question 3

Which of the following is true in general of all cations?

Accepted Answer

A)  A cation has an equal number of protons and electrons. 
B)  A cation has fewer protons than electrons. 
C)  A cation has more protons than electrons. 
D)  A cation has more protons than neutrons. 
A)  A cation has an equal number of protons and electrons. 
B)  A cation has fewer protons than electrons. 
C)  A cation has more protons than electrons. 
D)  A cation has more protons than neutrons.

Question 4

What is the measure of the H-O-H bond angle in water, H2O?

Accepted Answer

A)  109.5° 
B)  120.0° 
C)  104.5° 
D)  90.0° 
A)  109.5° 
B)  120.0° 
C)  104.5° 
D)  90.0°

Question 5

What is the correct name of K2HPO4?

Accepted Answer

A)  dipotassium hydrogen phosphate 
B)  potassium hydrogen phosphoxide 
C)  potassium hydrogen phosphate 
D)  potassium dihydrogen phosphate 
A)  dipotassium hydrogen phosphate 
B)  potassium hydrogen phosphoxide 
C)  potassium hydrogen phosphate 
D)  potassium dihydrogen phosphate

Question 6

Which of the following atoms is the least likely to form an ion?

Accepted Answer

A)  chlorine 
B)  potassium 
C)  xenon 
D)  iron 
A)  chlorine 
B)  potassium 
C)  xenon 
D)  iron

Question 7

An ionic bond is associated with which of the following?

Accepted Answer

A)  interactions between nuclei 
B)  equal sharing of electrons 
C)  unequal sharing of electrons 
D)  the transfer of electrons 
A)  interactions between nuclei 
B)  equal sharing of electrons 
C)  unequal sharing of electrons 
D)  the transfer of electrons

Question 8

What is the observed value of the H-N-H bond angle in ammonia, NH3?

Accepted Answer

A)  109.5° 
B)  107.3° 
C)  120.0° 
D)  90.0° 
A)  109.5° 
B)  107.3° 
C)  120.0° 
D)  90.0°

Question 9

Which of the following elements is the most likely to gain electrons to become an anion?

Accepted Answer

A)  Ar 
B)  C 
C)  I 
D)  Mg 
A)  Ar 
B)  C 
C)  I 
D)  Mg

Question 10

Which of the following molecules is not polar?

Accepted Answer

A)  CH3Cl 
B)  CH2Cl2 
C)  CCl4 
D)  CHCl3 
A)  CH3Cl 
B)  CH2Cl2 
C)  CCl4 
D)  CHCl3

Question 11

Which types of elements generally have low electronegativities?

Accepted Answer

A)  alkali metals 
B)  halogens 
C)  metalloids 
D)  nonmetals 
A)  alkali metals 
B)  halogens 
C)  metalloids 
D)  nonmetals

Question 12

What is the correct chemical name of a compound with the formula N2O3?

Accepted Answer

A)  nitrogen oxide 
B)  nitrogen trioxide 
C)  nitrogen ozide 
D)  dinitrogen trioxide 
A)  nitrogen oxide 
B)  nitrogen trioxide 
C)  nitrogen ozide 
D)  dinitrogen trioxide

Question 13

In which of the following molecules does the carbon atom have a linear distribution of electron density?

Accepted Answer

A)  C2H2 
B)  C2H4 
C)  C2H6 
D)  none of these 
A)  C2H2 
B)  C2H4 
C)  C2H6 
D)  none of these

Question 14

The following represents carbonic acid, an important part of the buffer system in blood.   How many polar bonds are represented in this structure?

Accepted Answer

A)  5 
B)  3 
C)  2 
D)  None of the bonds are polar. 
A)  5 
B)  3 
C)  2 
D)  None of the bonds are polar.

Question 15

An ammonium ion has the formula NH4+. How many nonbonding electrons must be shown in the Lewis structure of the ammonium ion?

Accepted Answer

A)  0 
B)  4 
C)  8 
D)  9 
A)  0 
B)  4 
C)  8 
D)  9

Question 16

To which of the following elements is the octet rule inapplicable?

Accepted Answer

A)  calcium 
B)  chromium 
C)  potassium 
D)  magnesium 
A)  calcium 
B)  chromium 
C)  potassium 
D)  magnesium

Question 17

Which of the following compounds is used as an antacid?

Accepted Answer

A)  NaHCO3 
B)  NaNO3 
C)  Na3PO4 
D)  Na2SO4 
A)  NaHCO3 
B)  NaNO3 
C)  Na3PO4 
D)  Na2SO4

Question 18

How many nonbonding electrons are present in a molecule of water?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
A)  2 
B)  4 
C)  6 
D)  8

Question 19

Which of the following pairs of atoms is the most likely to form an ionic compound?

Accepted Answer

A)  sulfur and oxygen 
B)  potassium and chlorine 
C)  chlorine and nitrogen 
D)  sodium and calcium 
A)  sulfur and oxygen 
B)  potassium and chlorine 
C)  chlorine and nitrogen 
D)  sodium and calcium

Question 20

Which of the following molecules is not polar?

Accepted Answer

A)  BCl3 
B)  NH3 
C)  HF 
D)  C2H5OH 
A)  BCl3 
B)  NH3 
C)  HF 
D)  C2H5OH

Exam 3: Chemical Bonds

What is the formula of the compound formed by barium and oxygen?

The following represents carbonic acid, an important part of the buffer system in blood. How many single covalent bonds are represented in this structure?

Which of the following is true in general of all cations?

What is the measure of the H-O-H bond angle in water, H2O?

What is the correct name of K2HPO4?

Which of the following atoms is the least likely to form an ion?

An ionic bond is associated with which of the following?

What is the observed value of the H-N-H bond angle in ammonia, NH3?

Which of the following elements is the most likely to gain electrons to become an anion?

Which of the following molecules is not polar?

Which types of elements generally have low electronegativities?

What is the correct chemical name of a compound with the formula N2O3?

In which of the following molecules does the carbon atom have a linear distribution of electron density?

The following represents carbonic acid, an important part of the buffer system in blood. How many polar bonds are represented in this structure?

An ammonium ion has the formula NH4+. How many nonbonding electrons must be shown in the Lewis structure of the ammonium ion?

To which of the following elements is the octet rule inapplicable?

Which of the following compounds is used as an antacid?

How many nonbonding electrons are present in a molecule of water?

Which of the following pairs of atoms is the most likely to form an ionic compound?

Which of the following molecules is not polar?

Matter, Energy, and Measurement

Atoms

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

What is the measure of the H-O-H bond angle in water, H₂O?

What is the correct name of K₂HPO₄?

What is the observed value of the H-N-H bond angle in ammonia, NH₃?

What is the correct chemical name of a compound with the formula N₂O₃?

An ammonium ion has the formula NH₄⁺. How many nonbonding electrons must be shown in the Lewis structure of the ammonium ion?