5 STEPS TO A 5: 500 AP Chemistry Questions to Know by Test Day! (2012)
Chapter 2. Chemical Bonding (Questions 51–90)
51. Which of the following compounds has the greatest ionic character?
(A) SiO2
(B) ClO2
(C) CH4
(D) AlF3
(E) SO2
52. Which of the following compounds has the greatest lattice energy?
(A) KCl
(B) NaCl
(C) CaCl2
(D) MgCl2
(E) FeCl3
53. Which of the following is the correct name for the compound with the chemical formula Mg3N2?
(A) Trimagnesiumdinitrogen
(B) Trimagnesiumdinitride
(C) Magnesium nitrogen
(D) Magnesium nitrate
(E) Magnesium nitride
Questions 54 and 55 refer to the following choices:
(A) N2
(B) F2
(C) O3
(D) NH3
(E) CO2
54. Has one or more bonds with a bond order of 1.5
55. Has one or more bonds with a bond order of 3
56. If metal X forms an ionic chloride with the formula XCl2, which of the following is most likely the formula for the stable phosphide of X?
(A) XP2
(B) X2P3
(C) X3P2
(D) X2(PO4)3
(E) X3(PO4)2
57. In which of the following processes are covalent bonds broken?
(A) C10H8(s) → C10H8(g)
(B) C(diamond) → C(graphite)
(C) NaCl(s) → NaCl(molten)
(D) KCl(s) → KCl(aq)
(E) NH4NO3(s) → NH4+(aq) + NO3−(aq)
58. In which of the following processes are covalent bonds broken?
(A) Solid sodium chloride melts.
(B) Bronze (an alloy of copper and tin) melts.
(C) Table sugar (sucrose) dissolves in water.
(D) Solid carbon (graphite) sublimes.
(E) Solid carbon dioxide (dry ice) sublimes.
59. Diamond is an extremely hard substance. This quality is best explained by the fact that a diamond crystal
(A) is ionic with a high lattice energy.
(B) is made completely of carbon, a very hard atom.
(C) is formed only under extremely high heat and pressure.
(D) has many delocalized electrons that contribute to greater van der Waal forces.
(E) is one giant molecule in which each atom forms strong bonds with each of its neighbors.
Questions 60–65 refer to the following answer choices:
(A) PCl5
(B) BH3
(C) NH3
(D) CO2
(E) SO2
60. The molecule with trigonal pyramidal molecular geometry
61. The molecule with trigonal bipyramidal molecular geometry
62. The molecule with trigonal planar molecular geometry
63. The molecule with bent molecular geometry
64. The molecule with linear molecular geometry
65. The molecule with tetrahedral electron pair geometry
Questions 66–70 refer to the following answer choices:
(A) C3H8
(B) C6H6
(C) H2O
(D) CO2
(E) CH2O
66. The molecule with the largest dipole moment
67. The molecule with the greatest number of π (pi) bonds
68. The molecule with the greatest number of σ (sigma) bonds
69. The molecule that contains a central atom with sp hybridization
70. The molecule with exactly one double bond
Questions 71–76 refer to the following answer choices:
(A) CO
(B) C2H4
(C) PH3
(D) HF
(E) O2
71. Has the largest dipole moment
72. Contains two π (pi) bonds
73. A necessary reactant for combustion reactions
74. Has trigonal pyramidal electron pair geometry
75. Contains the most σ (sigma) bonds
76. One of two allotropes of an element found in Earth’s atmosphere
Questions 77–80 refer to the following answer choices:
(A) CCl4
(B) CO2
(C) H2O
(D) BH3
(E) NH3
77. This molecule has exactly 2 double bonds.
78. This molecule has the largest dipole moment.
79. This molecule has a trigonal planar molecular geometry.
80. This molecule has a trigonal pyramidal molecular geometry.
81. Types of hybridization exhibited by C atoms in ethane include which of the following?
I. sp
II. sp2
III. sp3
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III
82. Types of hybridization exhibited by C atoms in hexene include which of the following?
(A) sp only
(B) sp2 only
(C) sp3 only
(D) sp and sp2 only
(E) sp2 and sp3 only
83. Types of hybridization exhibited by C atoms in butyne include which of the following?
I. sp
II. sp2
III. sp3
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III
84. There is a progressive decrease in the bond angle in the series of molecules CCl4, PCl3, and H2O. According to the VSEPR model, this is best explained by:
(A) Increasing polarity of bonds
(B) Increasing electronegativity of the central atom
(C) Increasing number of unbonded electrons
(D) Decreasing size of the central atom
(E) Decreasing bond strength
85. Which of the following is a nonpolar molecule that contains polar bonds?
(A) H2
(B) O2
(C) CO2
(D) CH4
(E) CH2F2
86. Which of the following molecules contains only single bonds?
(A) C3H6
(B) C6H6
(C) C6H14
(D) CH3CHO
(E) CH3CH2COOH
87. Which of the following describes the hybridization of the phosphorus atom in the compound PCl5?
(A) sp
(B) sp2
(C) sp3
(D) sp3d
(E) sp3d2
88. Which of the following single bonds is the least polar?
(A) H–N
(B) H–O
(C) F–O
(D) I–F
(E) H–F
89. Which of the following molecules has an angular (bent) geometry and is most commonly represented as a resonance hybrid of two or more Lewis-dot structures?
(A) O3
(B) H2O
(C) CO2
(D) BeCl2
(E) OF2
90. Which of the following molecules has the largest dipole moment?
(A) CO
(B) HCN
(C) HCl
(D) HF
(E) NH3