CHAPTER 3 — CHEMICAL BONDS
MULTIPLE CHOICE
1. How many main types of chemical bonds exist?
a. 1
c. 3
b. 2
d. 4
ANS: B
PTS: 1
TOP: 3.1 - WHAT DO WE NEED TO KNOW BEFORE WE BEGIN?
2. Which of the following is true in general of all cations?
a. A cation has equal numbers 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.
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
3. Which of the following is generally true of all anions?
a. An anion has equal numbers 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.
ANS: B
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
4. Which is most likely true for an atom with six valence electrons?
a. It will gain one electron.
b. It will gain two electrons.
c. It will lose one electron.
d. It will lose two electrons.
ANS: B
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
5. Which is most likely true for an atom with one valence electron?
a. It will gain one electron.
b. It will gain two electrons.
c. It will lose one electron.
d. It will lose two electrons.
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
6. Which of the following atoms is least likely to form an ion?
a. fluorine
c. neon
b. magnesium
d. sodium
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
7. For which of the following atoms do we not try to apply the octet rule?
a. oxygen
c. sodium
b. nickel
d. xenon
ANS: B
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
8. What is the valence shell electron configuration of all the noble gases except for helium?
a. ns2
c. ns2np6
2
3
b. ns np
d. np8
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
9. Which of the following elements is most likely to lose electrons to become a cation?
a. Ar
c. Cl
b. C
d. Fe
ANS: D
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
10. Which of the following elements is most likely to gain electrons to become an anion?
a. Ar
c. Cl
b. C
d. Fe
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
11. Which of the following occurs when a magnesium atom is converted to Mg2+?
a. The magnesium atom gains two electrons and loses two protons.
b. The magnesium atom gains two electrons.
c. The magnesium atom loses two electrons and two protons.
d. The magnesium atom loses two electrons.
ANS: D
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
12. Which of the following occurs when a sulfur atom is converted to S2–?
a. The sulfur atom gains two electrons and loses two protons.
b. The sulfur atom gains two electrons.
c. The sulfur atom loses two electrons and two protons.
d. The sulfur loses two electrons.
ANS: B
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
13. Which of the following ions has the same electronic configuration as argon?
a. K+
c. both a and b
b. Ca2+
d. neither a nor b
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
14. Which of the following ions has the same electronic configuration as argon?
a. K2+
c. both a and b
b. Ca+
d. neither a nor b
ANS: D
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
15. In what form is lithium administered when it is used as a drug in the treatment of manic depression?
a. Li–
c. Li+
b. Li
d. Li2+
ANS: C
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
16. In what form is fluorine administered when it is used to prevent tooth decay?
a. F–
c. F2
b. F
d. F+
ANS: A
PTS: 1
TOP: 3.2 - WHAT IS THE OCTET RULE?
17. What is the name of the species formed when a sodium atom loses an electron?
a. sodate
c. sodium
b. sodide
d. sodium ion
ANS: B
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
18. What is the name of the species formed when a bromine atom gains an electron?
a. bromate
c. bromine
b. bromide
d. bromine ion
ANS: B
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
19. For which types of elements do we sometimes use the “ous/ic” system in naming ions?
a. alkali metals
c. noble gases
b. halogens
d. transition metals
ANS: D
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
20. In the “ous/ic” system which species is named with the “ic” ending?
a. the less negative anion
c. the less positive cation
b. the more negative anion
d. the more positive cation
ANS: D
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
21. What is the common name of Cu+?
a. copper ion
b. cuprate ion
c. cupric ion
d. cuprous ion
ANS: D
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
22. What is the common name of Cu2+?
a. copper ion
b. cuprate ion
c. cupric ion
d. cuprous ion
ANS: C
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
23. Which of the following is the stannic ion?
a. Sn+
b. Sn2+
c. Sn3+
d. Sn4+
ANS: D
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
24. Which of the following is the stannous ion?
a. Sn+
b. Sn2+
c. Sn3+
d. Sn4+
ANS: B
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
25. Which of the following endings is generally associated with a monatomic anion?
a. -ade
c. -ic
b. -ate
d. -ide
ANS: D
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
26. If the name of an ion ends in “ate” what type of ion is it most likely to be?
a. a monatomic anion
c. a polyatomic anion
b. a monatomic cation
d. a polyatomic cation
ANS: C
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
27. The preferred name for HCO3– is hydrogen carbonate. What is the common name for this ion?
a. bicarbonate
c. bicarbide
b. dicarbonate
d. dicarbide
ANS: A
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
28. The “ide” ending is usually, but not always, associated with monatomic anions. Which of the
following polyatomic ions has a name which ends in “ide”?
a. C2H3O2–
c. OH–
b. HPO42–
d. SO42–
ANS: C
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
29. Which of the following is true of polyatomic ions?
a. All are anions.
b. All are cations.
c. The vast majority are anions.
d. The vast majority are cations.
ANS: C
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
30. What is the relationship between the nitrate ion and the nitrite ion?
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.
ANS: B
PTS: 1
TOP: 3.3 - HOW DO WE NAME ANIONS AND CATIONS?
31. An ionic bond is associated with which of the following?
a. interactions between nuclei
c. unequal sharing of electrons
b. equal sharing of electrons
d. the transfer of electrons
ANS: D
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
32. A covalent bond is associated with which of the following?
a. interactions between nuclei
c. the transfer of electrons
b. the sharing of electrons
d. all of these
ANS: B
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
33. High electronegativities are associated with which type of elements?
a. metals
c. noble gases
b. metalloids
d. nonmetals
ANS: D
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
34. Low electronegativities are associated with which type of elements?
a. metals
c. noble gases
b. metalloids
d. nonmetals
ANS: A
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
35. Which of the following elements is most electronegative?
a. B
c. N
b. C
d. O
ANS: D
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
36. Which halogen atom is most electronegative?
a. bromine
c. fluorine
b. chlorine
d. iodine
ANS: C
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
37. Which pair of species is most likely to form an ionic bond?
a. two electrically neutral species
b. two electrically charged species, one positive and one negative
c. two negatively charged species
d. two positively charged species
ANS: B
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
38. Which of the following situations is most likely to result in formation of a covalent bond?
a. when an electrically positive species interacts with an electrically negative species
b. when two nonmetallic elements interact to form a compound
c. when two electrically negative species interact
d. when two electrically positive species interact
ANS: B
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
39. Which of the following statements is generally true about electronegativity?
a. Electronegativity decreases as we move left to right and decreases as we move top to
bottom.
b. Electronegativity decreases as we move left to right and increases as we move top to
bottom.
c. Electronegativity increases as we move left to right and decreases as we move top to
bottom.
d. Electronegativity increases as we move left to right and increases as we move top to
bottom.
ANS: C
PTS: 1
TOP: 3.4 - WHAT ARE THE TWO MAJOR TYPES OF CHEMICAL BONDS?
40. Which of the following occurs when an ionic bond is formed?
a. Electrons are transferred from the more electronegative element to the less electronegative
element.
b. Electrons are transferred from the less electronegative element to the more electronegative
element.
c. Electrons are shared equally.
d. Electrons are shared unequally.
ANS: B
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
41. For which of the following pairs are the atoms most likely to form an ionic bond with each other?
a. carbon and oxygen
c. chlorine and oxygen
b. calcium and chlorine
d. sodium and magnesium
ANS: B
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
42. Under which of the following conditions is the A—B bond considered to be ionic?
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
ANS: D
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
43. Which of the following is true of ionic compounds?
a. They are liquids at room temperature.
b. They are solids in which individual molecules are present.
c. They are solids in which both cations and anions are present.
d. Depending on the compound any one of the above may apply.
ANS: C
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
44. What is the formula of the compound formed by potassium and chlorine?
a. KCl
c. KCl3
b. KCl2
d. K2Cl
ANS: A
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
45. What is the formula of the compound formed by calcium and fluorine?
a. CaF
c. CaF3
b. CaF2
d. Ca2F
ANS: B
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
46. What is the formula of the compound formed by an iron(III) ion and oxygen?
a. FeO
c. Fe2O3
b. FeO2
d. Fe3O2
ANS: C
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
47. What is the formula of the compound formed between barium and oxygen?
a. Ba2O2
c. BaO2
b. Ba2O
d. BaO
ANS: D
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
48. Which of the following is the correct way to write the formula of the compound formed between the
barium ion and the sulfate ion?
a. Ba2(SO4)2
c. Ba(SO4)2
b. Ba2SO4
d. BaSO4
ANS: D
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
49. Which of the following is the correct way to write the formula of the compound formed between the
calcium ion and the sulfate ion?
a. Ca2(SO4)2
c. Ca(SO4)2
b. Ca2SO4
d. CaSO4
ANS: D
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
50. What is the formula of the compound formed between the ammonium ion and the carbonate ion?
a. NH4CO3
c. (NH4)2CO3
b. NH4(CO3)2
d. (NH4)3CO3
ANS: C
PTS: 1
51. What is the correct name for MgO?
a. monomagnesium monoxide
b. magnesium monoxide
TOP: 3.5 - WHAT IS AN IONIC BOND?
c. magnesium oxide
d. magnesium oxygen
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
52. What is the correct name for BaI2?
a. barium iodine
b. barium iodide
c. barium diiodide
d. monobarium diiodide
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
53. What is the correct name for KCl?
a. monopotassium monochloride
b. potassium chlorine
c. potassium chloride
d. potassium ion chloride ion
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
54. What is the correct name for BaH2?
a. monobarium dihydride
c. barium hydrogen
b. barium dihydride
d. barium hydride
ANS: D
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
55. AgCl is a chemical commonly used in photography. What is the correct name for AgCl?
a. monosilver monochloride
c. silver chlorine
b. silver chloride
d. silver monochlorine
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
56. What is the correct formula for sodium fluoride?
a. NaFI2
c. Na2F
b. NaF
d. Na2F2
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
57. The term “limelight” is derived from the old name for calcium oxide. What is the formula of calcium
oxide?
a. CaO2
c. CaO
b. Ca2O
d. Ca2O2
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
58. What is the correct formula for aluminum oxide?
a. AlO
c. Al2O
b. AlO2
d. Al2O3
ANS: D
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
59. The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the
common name for this compound?
a. stannic fluoride
c. tin fluoride
b. stannous fluoride
d. tin(II) fluorine
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
60. The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the correct
systematic name for this compound?
a. stannic fluoride
c. tin fluoride
b. stannous fluoride
d. tin(II) fluoride
ANS: D
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
61. What is the correct systematic name for the compound with the formula CuCl2?
a. cupric chloride
c. copper(II) chloride
b. cuprous chloride
d. copper(II) chlorine
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
62. What is the correct common name for the compound with the formula CuCl2?
a. copper chloride
c. cupric chloride
b. copper chlorine
d. cuprous chloride
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
63. The chemical formula of rust is Fe2O3. Which of the following is the correct systematic name for this
compound?
a. iron oxide
c. iron(III) oxide
b. iron(II) oxide
d. diiron trioxide
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
64. The chemical formula of rust is Fe2O3. Which of the following is the correct common name for this
compound?
a. iron oxide
c. ferrous oxide
b. ferric oxide
d. diiron trioxide
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
65. What is the correct name for K2HPO4?
a. dipotassium hydrogen phosphate
b. potassium hydrogen phosphoxide
c. potassium hydrogen phosphate
d. potassium dihydrogen phosphate
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
66. What is the correct name for KH2PO4?
a. potassium hydride phosphate
b. potassium hydrogen phosphoxide
c. potassium hydrogen phosphate
d. potassium dihydrogen phosphate
ANS: D
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
67. What is the correct name for Al2(SO4)3?
a. dialuminum trisulfate
b. aluminum trisulfate
c. aluminum sulfate
d. aluminum sulfoxide
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
68. What is the correct systematic name for FeCO3?
a. ferric carbonate
c. iron(I) carbonate
b. ferrous carbonate
d. iron(II) carbonate
ANS: D
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
69. FeSO4 is commonly used to treat iron deficiency. Which of the following is the correct name for this
compound?
a. iron sulfate
c. iron(III) sulfate
b. iron(II) sulfate
d. iron sulfur tetroxide
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
70. A compound used in the treatment of manic depression has the formula Li2CO3. Which of the
following is the correct name for this compound?
a. dilithium carbonate
c. lithium carbonate
b. lithium carbon trioxide
d. lithium carboxide
ANS: C
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
71. What is the correct name for NH4NO3, a compound found in fertilizers?
a. ammonia nitrate
c. ammonia nitrite
b. ammonium nitrate
d. ammonium nitrite
ANS: B
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
72. Which of the following compounds is used as an antacid?
a. NaHCO3
c. Na3PO4
b. NaNO3
d. Na2SO4
ANS: A
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
73. Which of the following compounds is used as a radiopaque medium for X-ray work?
a. BaSO4
c. FeSO4
b. CaSO4
d. MgSO4
ANS: A
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
74. What electronegativity difference is associated with a nonpolar covalent bond?
a. exactly 0
c. between 0.5 and 1.9
b. less than 0.5
d. greater than 1.9
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
75. Which of the following bonds is the most polar?
a. H—F
c. H—Br
b. H—Cl
d. H—I
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
76. Which of the following bonds is the most polar?
a. C—H
c. C—O
b. C—N
d. C—F
ANS: D
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
77. In which of the following cases is a polar covalent bond formed?
a. when an electron is transferred from one atom to another
b. when the electrons of a bond are shared equally by the two atoms
c. when the electrons of a bond are shared unequally by the two atoms
d. when a metallic element forms a bond with a non-metallic element
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
78. Which of the following is true about elements which exist as diatomic molecules?
a. The bond in the molecule is nonpolar covalent.
b. The bond in the molecule is polar covalent.
c. The bond in the molecule is ionic.
d. The type of bond depends on the specific molecule.
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
79. Which Greek letter is used in denoting the spatial distribution of charge in a polar bond?
a. alpha, 
c. gamma, 
b. beta, 
d. delta, 
ANS: D
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
80. How many electrons are associated with a single bond?
a. 1
c. 4
b. 2
d. 6
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
81. How many electrons are associated with a double bond?
a. 1
c. 4
b. 2
d. 6
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
82. How many electrons are associated with a triple bond?
a. 2
c. 4
b. 3
d. 6
ANS: D
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
83. Formaldehyde has the chemical formula CH2O. How many electrons must be shown in the Lewis
structure of formaldehyde?
a. 4
c. 12
b. 8
d. 16
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
84. Formaldehyde has the chemical formula CH2O. How many nonbonding electrons must be shown in
the Lewis structure of formaldehyde?
a. 0
c. 8
b. 4
d. 12
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
85. The ammonium ion has the formula NH4+. How many electrons must be shown in the Lewis structure
of the ammonium ion?
a. 4
c. 8
b. 5
d. 9
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
86. The toxic gas hydrogen cyanide has the formula HCN. How many electrons must be shown in the
Lewis structure of hydrogen cyanide?
a. 2
c. 10
b. 6
d. 12
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
87. The toxic gas hydrogen cyanide has the formula HCN. How many nonbonding electrons must be
shown in the Lewis structure of hydrogen cyanide?
a. 2
c. 10
b. 6
d. 12
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
88. How many nonbonding electrons are present in a molecule of water?
a. 2
c. 6
b. 4
d. 8
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
89. The ammonium ion has the formula NH4+. How many nonbonding electrons must be shown in the
Lewis structure of the ammonium ion?
a. 0
c. 8
b. 4
d. 9
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
90. How many bonds does a carbon atom typically form?
a. 2
c. 6
b. 4
d. 8
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
91. Ethylene has the formula C2H4. Which of the following is a correct description of ethylene?
a. Ethylene has only single bonds.
c. Ethylene has one triple bond.
b. Ethylene has one double bond.
d. None of these is correct.
ANS: B
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
92. Acetylene has the formula C2H2. Which of the following is a correct description of acetylene?
a. Acetylene has only single bonds.
c. Acetylene has one triple bond.
b. Acetylene has one double bond.
d. None of these is correct.
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
93. The toxic gas hydrogen cyanide has the formula HCN. Which of the following is a correct description
of hydrogen cyanide?
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.
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
94. In a Lewis structure, which of the following atoms can have more than eight electrons associated with
it?
a. C
b. O
ANS: C
c. S
d. none of these
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
95. In a Lewis structure, which of the following atoms can have more than eight electrons associated with
it?
a. C
c. O
b. N
d. none of these
ANS: D
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
96. When we name a molecular binary compound which of the following is true?
a. The element which has more atoms in the molecule is named first.
b. We name the elements in alphabetical order.
c. We name the less electronegative element first.
d. We name the more electronegative element first.
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
97. Laughing gas, sometimes called nitrous oxide, has the formula N2O. What is the proper chemical
name for nitrous oxide?
a. nitrogen oxide
c. dinitrogen oxide
b. nitrogen dioxide
d. dinitrogen oxygen
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
98. What is the name of NO2?
a. nitrogen oxide
b. nitrogen oxygen
c. nitrogen dioxide
d. nitrous oxide
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
99. What is the correct chemical name for a compound with the formula N2O3?
a. nitrogen oxide
c. nitrogen ozide
b. nitrogen trioxide
d. dinitrogen trioxide
ANS: D
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
100. What is the name of SCl2?
a. sulfur chloride
b. sulfur chlorine
c. monosulfur chloride
d. sulfur dichloride
ANS: D
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
101. What is the systematic name of CS2?
a. carbon disulfur
b. carbon sulfide
c. carbon(IV) sulfide
d. carbon disulfide
ANS: D
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
102. What is the correct name for XeF4?
a. xenon fluoride
b. xenon difluoride
c. xenon tetrafluoride
d. xenon hexafluoride
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
103. Which of the following is the correct formula for dinitrogen trioxide?
a. O2N3
c. N2O3
b. O3N2
d. N3O2
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
104. Which of the following is the correct formula for dinitrogen pentoxide?
a. O2N5
c. N2O5
b. O5N2
d. N5O2
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
105. Which of the following statements about nitric oxide, NO, is false?
a. NO contains an unpaired electron.
b. NO decreases the ability of the blood to carry oxygen.
c. NO is an important signaling molecule in the cardiovascular system.
d. None, all of the above are true.
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
106. Which of the following symbols is used to denote that two or more representations of a species are
resonance structures?
a. 
c.
b. 
d. 
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
107. Which of the following is true of the individual resonance structures which contribute to a resonance
hybrid?
a. Each resonance structure actually exists.
b. Each resonance structure is less stable than is the resonance hybrid.
c. In going from one resonance structure to another the electrons move from one location to
another.
d. None of the above is true.
ANS: B
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
108. Which of the following is true of the individual resonance structures which contribute to a resonance
hybrid?
a. Each resonance structure actually exists.
b. Each resonance structure is more stable than is the resonance hybrid.
c. In going from one resonance structure to another the electrons move from one location to
another.
d. None of the above is true.
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
109. Which of the following is true in the carbonate ion, CO32–?
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 the above is true.
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
110. Which of the following is true in the carbonate ion, CO32–?
a. All of the carbon to oxygen bonds are equivalent.
b. The carbon atom does not have an octet.
c. The carbon atoms form two single bonds and one double bond.
d. The electrons are constantly moving from one bond location to another.
ANS: A
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
111. Which of the following is expected to be true in the carbonate ion, CO32-?
a. The carbon atom does not have an octet.
b. The carbon to oxygen bond lengths are the consistent with single bonds.
c. The carbon to oxygen bond lengths are the consistent with double bonds.
d. The carbon to oxygen bonds are shorter than single bonds but longer than double bonds.
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
112. A student is attempting to draw several resonance structures for a species. Which of the following is
allowed?
a. Change the connectivities of the nuclei.
b. Move electrons from one location to another.
c. both a and b
d. neither a nor b
ANS: B
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
113. A student is attempting to draw several resonance structures for a species. Which of the following is
allowed ?
a. Change the number of paired and unpaired electrons.
b. Move electrons from one location to another.
c. both a and b
d. neither a nor b
ANS: B
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
114. A student is attempting to draw several resonance structures for a species. Which of the following is
allowed?
a. Change the connectivities of the nuclei.
b. Change the number of paired and unpaired electrons.
c. both a and b
d. neither a nor b
ANS: D
PTS: 1
TOP: 3.9 - WHAT IS RESONANCE?
115. To use the VSEPR model to determine the geometry of a molecule we need to know which of the
following?
a. the number of atoms in the molecule
b. the number of atoms bonded to the central atom
c. the number of lone pairs around the central atom
d. both b and c
ANS: D
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
116. What bond angle is most closely associated with a tetrahedral distribution of electron density?
a. 90°
c. 120°
b. 109.5°
d. 180°
ANS: B
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
117. What bond angle is most closely associated with a trigonal planar distribution of electron density?
a. 90°
c. 120°
b. 109.5°
d. 180°
ANS: C
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
118. What bond angle is most closely associated with a linear distribution of electron density?
a. 90°
c. 120°
b. 109.5°
d. 180°
ANS: D
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
119. Which of the following molecules is best described as having a nearly tetrahedral distribution of
electron density?
a. BeCl2
c. SnCl2
b. OF2
d. none of these
ANS: B
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
120. In which of the following molecules does the carbon atom have a nearly trigonal planar distribution of
electron density?
a. C2H2
c. C2H6
b. C2H4
d. none of these
ANS: B
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
121. In which of the following molecules does the carbon atom have a linear distribution of electron
density?
a. C2H2
c. C2H6
b. C2H4
d. none of these
ANS: A
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
122. In which of the following molecules does the carbon atom have a nearly tetrahedral distribution of
electron density?
a. C2H2
c. C2H6
b. C2H4
d. none of these
ANS: C
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
123. Which of the following approximates the H—N—H bond angle in ammonia, NH3?
a. 109.5°
c. 120.0 °
b. 107.3°
d. 90.0°
ANS: B
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
124. Which of the following is the H—O—H bond angle in water, H2O?
a. 109.5°
c. 104.5°
b. 120.0°
d. 90.0°
ANS: C
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
125. Which of the following describes how a double bond is treated in the VSEPR model?
a. as two single bonds
c. as a single region of electron density
b. as two nonbonding pairs
d. none of the these
ANS: C
PTS: 1
TOP: 3.10 - HOW DO WE PREDICT BOND ANGLES IN COVALENT COMPOUNDS?
126. Which of the following molecules is(are) polar?
a. H2O
c. both of them
b. CO2
d. neither of them
ANS: A
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
127. Which of the following molecules is(are) polar?
a. BCl3
c. both of them
b. NH3
d. neither of them
ANS: B
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
128. Which of the following molecules is(are) polar?
a. CCl4
c. both of them
b. CH2Cl2
d. neither of them
ANS: B
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
129. Which of the following molecules is(are) polar?
a. CH3Cl
c. both of them
b. CH2Cl2
d. neither of them
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
130. Which of the following molecules is(are) polar?
a. CH3Cl
c. both of them
b. HCN
d. neither of them
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
131. Which of the following molecules is nonpolar?
a. CHCl3
c. CH3Cl
b. CH2Cl2
d. None, they are all polar.
ANS: D
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
132. Which of the following molecules is polar?
a. CH3—CH3
b. CH2Cl—CH2Cl
c. CH3—CHCl2
d. none of these
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
133. Which of the following molecules is(are) polar?
a. CH2Cl—CH2Cl
c. both a and b
b. CH3—CHCl2
d. neither a nor b
ANS: B
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
134. Which of the following is true for the molecule O=C=S?
a. O=C=S is nonpolar because it contains only double bonds.
b. O=C=S is nonpolar because it is linear.
c. O=C=S is polar because it has a bent shape.
d. O=C=S is polar because the polarities of the O=C and C=S do not cancel.
ANS: D
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
135. Which of the following is true about a molecule which contains three polar bonds which have the same
degree of polarity?
a. The molecule will always be polar.
b. The molecule will never be polar.
c. The molecule will be polar if the electron distribution is trigonal planar.
d. None of the above is true.
ANS: D
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
136. Which of the following is true about a molecule which contains three polar bonds each of which have
the same degree of polarity?
a. The molecule will always be polar.
b. The molecule will never be polar.
c. The molecule will be polar if the electron distribution is tetrahedral.
d. None of the above is true.
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
137. Which of the following is true about a molecule which contains two polar bonds which have the same
degree of polarity?
a. It will always be polar.
b. It will never be polar.
c. It will only be polar if it is bent.
d. It will only be polar if it is linear.
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
138. Which of the following is true about a molecule which contains two polar bonds which have the
different degrees of polarity?
a. It will always be polar.
b. It will never be polar.
c. It will only be polar if it is bent.
d. It will only be polar if it is linear.
ANS: A
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
139. A student discussing bond polarity and molecular polarity in alcohols made the following statements:
(i) In methanol, CH3OH the H—O bond is more 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?
a. only statement (i)
b. only statement (ii)
c. both statement (i) and statement (ii)
d. neither statement (i) nor statement (ii)
ANS: C
PTS: 1
TOP: 3.11 - HOW DO WE DETERMINE IF A MOLECULE IS POLAR?
Examine the following image representing the structure of a compound.
140. Which of the following is most likely the type of bonding in this compound?
a. ionic
c. polar covalent
b. nonpolar covalent
d. electronegative
ANS: A
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
141. Which of the following is a possible formula for the compound represented in the image?
a. KBr
d. ICl
b. HCl
e. CaCl2
c. NO
f. more than one of these
ANS: A
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
142. If the smaller spheres represented Cu+ and the larger spheres Cl–, what would be the correct name of
this compound?
a. copper monochloride
b. copper(I) chloride
c. copper(II) chloride
d. cuprous chloride
e. cupric chloride
f. either b or d
g. either c or d
ANS: F
PTS: 1
TOP: 3.6 - HOW DO WE NAME IONIC COMPOUNDS?
143. If the larger sphere represented S2-, the smaller sphere might represent which of the following?
a. K+
c. Mg2+
2b. O
d. Al3+
ANS: C
PTS: 1
TOP: 3.5 - WHAT IS AN IONIC BOND?
The following represents carbonic acid, an important part of the buffer system in blood.
144. How many total valence electrons were used in constructing this structure?
a. 24
b. 12
c. 17
d. 22
e. none of these
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
145. How many polar bonds are represented in this structure?
a. 5
b. 3
c. 2
d. None of the bonds are polar.
ANS: A
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
146. How many single covalent bonds are represented in this structure?
a. 6
c. 4
b. 5
d. 3
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
147. How many nonbonding electrons are present in this structure?
a. 3
c. 12
b. 6
d. The are no nonbonding electrons.
ANS: C
PTS: 1
TOP: 3.7 - WHAT IS A COVALENT BOND?
Consider the following Lewis structure.
148. What is the correct name for this compound?
a. monphosphorus pentachloride
b. phosphorus chloride
c. phosphorus pentachloride
d. pentaphosphorus chloride
e. phophorus pentachlorine
ANS: C
PTS: 1
TOP: 3.8 - HOW DO WE NAME BINARY COVALENT COMPOUNDS?
149. Which of the following correctly characterizes this compound?
a. All atoms obey the octet rule.
b. 40 valence electrons are represented.
c. The central atom is from period 4.
d. Contains a metalloid and a nonmetal.
e. None of these are true of this compound.
ANS: B
PTS: 1