Question 1

A student is attempting to draw several resonance structures for CO2. Which of the following is allowed?

Accepted Answer

A)  changing the connectivity of the nuclei 
B)  changing the positions of valence electrons 
C)  changing the compound to CO and O2 gases 
D)  changing the connectivity of the O-O bond 
A)  changing the connectivity of the nuclei 
B)  changing the positions of valence electrons 
C)  changing the compound to CO and O2 gases 
D)  changing the connectivity of the O-O bond B

Question 2

Laughing gas, sometimes called nitrous oxide, has the formula N2O. What is the proper chemical name of nitrous oxide?

Accepted Answer

A)  nitrogen oxide 
B)  nitrogen dioxide 
C)  dinitrogen oxide 
D)  dinitrogen oxygen 
A)  nitrogen oxide 
B)  nitrogen dioxide 
C)  dinitrogen oxide 
D)  dinitrogen oxygen C

Question 3

Which of the following elements is the most likely to lose electrons to become a cation?

Accepted Answer

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

Question 4

Which of the following is true in the carbonate ion, CO32−?

Accepted Answer

A)  The carbon atom does not have an octet. 
B)  The ion has 22 valence electrons. 
C)  The electrons are constantly moving from one bond location to another. 
D)  None of these is true. 
A)  The carbon atom does not have an octet. 
B)  The ion has 22 valence electrons. 
C)  The electrons are constantly moving from one bond location to another. 
D)  None of these is true.

Question 5

Acetylene has the formula C2H2. Which of the following is a correct description of acetylene?

Accepted Answer

A)  Acetylene has only single bonds. 
B)  Acetylene has one double bond. 
C)  Acetylene has one triple bond. 
D)  None of these is correct. 
A)  Acetylene has only single bonds. 
B)  Acetylene has one double bond. 
C)  Acetylene has one triple bond. 
D)  None of these is correct.

Question 6

What is the common name of Cu+?

Accepted Answer

A)  copper ion 
B)  cuprate ion 
C)  cupric ion 
D)  cuprous ion 
A)  copper ion 
B)  cuprate ion 
C)  cupric ion 
D)  cuprous ion

Question 7

Which of the following symbols is used to denote that two or more representations of a species are resonance structures?

Accepted Answer

A)  → 
B)  ← 
C)  ⇌ 
D)  ↔ 
A)  → 
B)  ← 
C)  ⇌ 
D)  ↔

Question 8

What bond angle is most closely associated with a trigonal planar distribution of electron density?

Accepted Answer

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

Question 9

Which of the following occurs when a calcium atom is converted to Ca2+?

Accepted Answer

A)  The calcium atom gains two electrons and loses two protons. 
B)  The calcium atom gains two electrons. 
C)  The calcium atom loses two electrons and two protons. 
D)  The calcium atom loses two electrons. 
A)  The calcium atom gains two electrons and loses two protons. 
B)  The calcium atom gains two electrons. 
C)  The calcium atom loses two electrons and two protons. 
D)  The calcium atom loses two electrons.

Question 10

What is the formula of the compound formed by an ammonium ion and a carbonate ion?

Accepted Answer

A)  NH4CO3 
B)  NH4(CO3)2 
C)  (NH4)2CO3 
D)  (NH4)3CO3 
A)  NH4CO3 
B)  NH4(CO3)2 
C)  (NH4)2CO3 
D)  (NH4)3CO3

Question 11

Under which of the following conditions is the A-B bond considered to be ionic?

Accepted Answer

A)  when A and B have the same electronegativity 
B)  when the difference between the electronegativities of the atoms is 1.0 
C)  when the difference between the electronegativities of the atoms is 1.5 
D)  when the difference between the electronegativities of the atoms is 2.0 
A)  when A and B have the same electronegativity 
B)  when the difference between the electronegativities of the atoms is 1.0 
C)  when the difference between the electronegativities of the atoms is 1.5 
D)  when the difference between the electronegativities of the atoms is 2.0

Question 12

What is the correct way to write the formula of the compound formed by a calcium ion and a sulfate ion?

Accepted Answer

A)  Ca3(SO4)2 
B)  Ca2SO4 
C)  Ca2(SO4)2 
D)  CaSO4 
A)  Ca3(SO4)2 
B)  Ca2SO4 
C)  Ca2(SO4)2 
D)  CaSO4

Question 13

What is the correct name of NH4NO3, a compound found in fertilizers?

Accepted Answer

A)  ammonia nitrate 
B)  ammonium nitrate 
C)  ammonia nitrite 
D)  ammonium nitrite 
A)  ammonia nitrate 
B)  ammonium nitrate 
C)  ammonia nitrite 
D)  ammonium nitrite

Question 14

Which of the following is generally true of all anions?

Accepted Answer

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

Question 15

Which of the following elements is most electronegative?

Accepted Answer

A)  B 
B)  C 
C)  N 
D)  O 
A)  B 
B)  C 
C)  N 
D)  O

Question 16

What is the correct name of KCl?

Accepted Answer

A)  monopotassium monochloride 
B)  potassium chlorine 
C)  potassium chloride 
D)  potassium ion chloride ion 
A)  monopotassium monochloride 
B)  potassium chlorine 
C)  potassium chloride 
D)  potassium ion chloride ion

Question 17

The preferred name of HCO3- is hydrogen carbonate. What is the common name of this ion?

Accepted Answer

A)  bicarbonate 
B)  dicarbonate 
C)  bicarbide 
D)  dicarbide 
A)  bicarbonate 
B)  dicarbonate 
C)  bicarbide 
D)  dicarbide

Question 18

The toxic gas hydrogen cyanide has the formula HCN. How many nonbonding electrons must be shown in the Lewis structure of hydrogen cyanide?

Accepted Answer

A)  2 
B)  6 
C)  10 
D)  12 
A)  2 
B)  6 
C)  10 
D)  12

Question 19

How many main types of chemical bonds exist?

Accepted Answer

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

Question 20

Which of the following compounds is used as a radiopaque medium for X-ray work?

Accepted Answer

A)  BaSO4 
B)  CaSO4 
C)  FeSO4 
D)  MgSO4 
A)  BaSO4 
B)  CaSO4 
C)  FeSO4 
D)  MgSO4

Exam 3: Chemical Bonds

A student is attempting to draw several resonance structures for CO2. Which of the following is allowed?

Laughing gas, sometimes called nitrous oxide, has the formula N2O. What is the proper chemical name of nitrous oxide?

Which of the following elements is the most likely to lose electrons to become a cation?

Which of the following is true in the carbonate ion, CO32−?

Acetylene has the formula C2H2. Which of the following is a correct description of acetylene?

What is the common name of Cu+?

Which of the following symbols is used to denote that two or more representations of a species are resonance structures?

What bond angle is most closely associated with a trigonal planar distribution of electron density?

Which of the following occurs when a calcium atom is converted to Ca2+?

What is the formula of the compound formed by an ammonium ion and a carbonate ion?

Under which of the following conditions is the A-B bond considered to be ionic?

What is the correct way to write the formula of the compound formed by a calcium ion and a sulfate ion?

What is the correct name of NH4NO3, a compound found in fertilizers?

Which of the following is generally true of all anions?

Which of the following elements is most electronegative?

What is the correct name of KCl?

The preferred name of HCO3- is hydrogen carbonate. What is the common name of this ion?

The toxic gas hydrogen cyanide has the formula HCN. How many nonbonding electrons must be shown in the Lewis structure of hydrogen cyanide?

How many main types of chemical bonds exist?

Which of the following compounds is used as a radiopaque medium for X-ray work?

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

A student is attempting to draw several resonance structures for CO₂. Which of the following is allowed?

Laughing gas, sometimes called nitrous oxide, has the formula N₂O. What is the proper chemical name of nitrous oxide?

Which of the following is true in the carbonate ion, CO₃²⁻?

Acetylene has the formula C₂H₂. Which of the following is a correct description of acetylene?

What is the common name of Cu⁺?

Which of the following occurs when a calcium atom is converted to Ca²⁺?

What is the correct name of NH₄NO₃, a compound found in fertilizers?

The preferred name of HCO₃^- is hydrogen carbonate. What is the common name of this ion?