Question 1

Consider the following Lewis structure.   Which of the following correctly characterizes this compound?

Accepted Answer

A)  All atoms obey the octet rule. 
B)  Forty valence electrons are represented. 
C)  The central atom is from period 4. 
D)  It contains a metalloid and a nonmetal. 
E)  None of these are true of this compound. 
A)  All atoms obey the octet rule. 
B)  Forty valence electrons are represented. 
C)  The central atom is from period 4. 
D)  It contains a metalloid and a nonmetal. 
E)  None of these are true of this compound.

Question 2

If the name of an ion ends in "ate," what type of ion is it most likely to be?

Accepted Answer

A)  a monatomic anion 
B)  a monatomic cation 
C)  a polyatomic anion 
D)  a polyatomic cation 
A)  a monatomic anion 
B)  a monatomic cation 
C)  a polyatomic anion 
D)  a polyatomic cation

Question 3

What is the relationship between the nitrate ion and the nitrite ion?

Accepted Answer

A)  The nitrate ion has one less oxygen atom than does the nitrite ion, and both have the same charge. 
B)  The nitrate ion has one more oxygen atom than does the nitrite ion, and both have the same charge. 
C)  In addition to having one less oxygen atom than nitrite, nitrate also has a larger negative charge. 
D)  In addition to having one more oxygen atom than nitrite, nitrate also has a larger negative charge. 
A)  The nitrate ion has one less oxygen atom than does the nitrite ion, and both have the same charge. 
B)  The nitrate ion has one more oxygen atom than does the nitrite ion, and both have the same charge. 
C)  In addition to having one less oxygen atom than nitrite, nitrate also has a larger negative charge. 
D)  In addition to having one more oxygen atom than nitrite, nitrate also has a larger negative charge.

Question 4

What is the correct name of BaH2?

Accepted Answer

A)  monobarium dihydride 
B)  barium dihydride 
C)  barium hydrogen 
D)  barium hydride 
A)  monobarium dihydride 
B)  barium dihydride 
C)  barium hydrogen 
D)  barium hydride

Question 5

How many electrons are associated with a single bond?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
A)  1 
B)  2 
C)  4 
D)  6

Question 6

Which of the following molecules is polar?

Accepted Answer

A)  CCl4 
B)  CH2Cl2 
C)  CH4 
D)  CO2 
A)  CCl4 
B)  CH2Cl2 
C)  CH4 
D)  CO2

Question 7

Which of the following statements is true of nitric oxide, NO?

Accepted Answer

A)  NO contains an unpaired electron. 
B)  NO contains five paired electrons. 
C)  NO is emitted from rancid food. 
D)  All of these are false. 
A)  NO contains an unpaired electron. 
B)  NO contains five paired electrons. 
C)  NO is emitted from rancid food. 
D)  All of these are false.

Question 8

A compound used in the treatment of gout and manic depression has the formula Li2CO3. What is the name of this compound?

Accepted Answer

A)  dilithium carbonate 
B)  lithium carbon trioxide 
C)  lithium carbonate 
D)  lithium carboxide 
A)  dilithium carbonate 
B)  lithium carbon trioxide 
C)  lithium carbonate 
D)  lithium carboxide

Question 9

What is the name of SCl2?

Accepted Answer

A)  sulfur chloride 
B)  sulfur chlorine 
C)  monosulfur chloride 
D)  sulfur dichloride 
A)  sulfur chloride 
B)  sulfur chlorine 
C)  monosulfur chloride 
D)  sulfur dichloride

Question 10

What bond angle is most closely associated with a tetrahedral 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 11

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

Accepted Answer

A)  changing the number of protons and neutrons 
B)  changing the number of paired and unpaired electrons 
C)  replacing an atom with its isotope 
D)  changing the position of paired electrons 
A)  changing the number of protons and neutrons 
B)  changing the number of paired and unpaired electrons 
C)  replacing an atom with its isotope 
D)  changing the position of paired electrons

Question 12

Which of the following bonds is the least polar?

Accepted Answer

A)  C-I 
B)  C-Br 
C)  C-Cl 
D)  C-F 
A)  C-I 
B)  C-Br 
C)  C-Cl 
D)  C-F

Question 13

In what form is lithium administered when it is used as a drug in the treatment of manic depression?

Accepted Answer

A)  Li- 
B)  Li 
C)  Li+ 
D)  Li2+ 
A)  Li- 
B)  Li 
C)  Li+ 
D)  Li2+

Question 14

Which of the following endings is generally associated with a monatomic anion?

Accepted Answer

A)  -ade 
B)  -ate 
C)  -ic 
D)  -ide 
A)  -ade 
B)  -ate 
C)  -ic 
D)  -ide

Question 15

What is the correct name of NaHCO3?

Accepted Answer

A)  sodium hydride carbonate 
B)  sodium hydrogen carboxide 
C)  sodium hydrogen carbonate 
D)  sodium hydrogen carbotrioxide 
A)  sodium hydride carbonate 
B)  sodium hydrogen carboxide 
C)  sodium hydrogen carbonate 
D)  sodium hydrogen carbotrioxide

Question 16

Which of the following is the correct formula of dinitrogen pentoxide?

Accepted Answer

A)  O2N5 
B)  O5N2 
C)  N2O5 
D)  N5O2 
A)  O2N5 
B)  O5N2 
C)  N2O5 
D)  N5O2

Question 17

How many bonds does a carbon atom typically form?

Accepted Answer

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

Question 18

A student discussing bond polarity and molecular polarity in alcohols made the following statements: (i) In methanol, CH3OH, the H-O bond is less polar than the C-O bond.
(ii) Ethanol, CH3CH2OH, the alcohol of alcoholic beverages, has at least one polar bond, a net dipole, and is a polar molecule.
Which of the above statements is(are) true?

Accepted Answer

A)  only statement (i) 
B)  only statement (ii) 
C)  both statement (i) and statement (ii) 
D)  neither statement (i) nor statement (ii) 
A)  only statement (i) 
B)  only statement (ii) 
C)  both statement (i) and statement (ii) 
D)  neither statement (i) nor statement (ii)

Question 19

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

Accepted Answer

A)  4 
B)  5 
C)  8 
D)  9 
A)  4 
B)  5 
C)  8 
D)  9

Question 20

The toxic gas hydrogen cyanide has the formula HCN. Which of the following is a correct description of hydrogen cyanide?

Accepted Answer

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

Exam 3: Chemical Bonds

Consider the following Lewis structure. Which of the following correctly characterizes this compound?

If the name of an ion ends in "ate," what type of ion is it most likely to be?

What is the relationship between the nitrate ion and the nitrite ion?

What is the correct name of BaH2?

How many electrons are associated with a single bond?

Which of the following molecules is polar?

Which of the following statements is true of nitric oxide, NO?

A compound used in the treatment of gout and manic depression has the formula Li2CO3. What is the name of this compound?

What is the name of SCl2?

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

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

Which of the following bonds is the least polar?

In what form is lithium administered when it is used as a drug in the treatment of manic depression?

Which of the following endings is generally associated with a monatomic anion?

What is the correct name of NaHCO3?

Which of the following is the correct formula of dinitrogen pentoxide?

How many bonds does a carbon atom typically form?

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

The toxic gas hydrogen cyanide has the formula HCN. Which of the following is a correct description of hydrogen cyanide?

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 correct name of BaH₂?

A compound used in the treatment of gout and manic depression has the formula Li₂CO₃. What is the name of this compound?

What is the name of SCl₂?

What is the correct name of NaHCO₃?

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