Multiple Choice
Identify the choice that best completes the
statement or answers the question.
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1.
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Which of the following pairs lists the substance with the higher vapor pressure
first?
A) | CCl4 and CBr4 | B) | C7H16 and
C5H12 | C) | CH3CH2OH and
CH3OCH3 | D) | H2O and
H2S |
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2.
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Which of the following is the most polar bond?
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3.
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Which of the following types of crystalline solids would be expected to have the
lowest melting point?
A) | non-polar molecules | B) | polar molecules | C) | ionic | D) | melting point is unpredictable and need more
information |
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4.
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Which of the following correctly lists the bond in order of decreasing
polarity?
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5.
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What is the approximate bond angle in FNO?
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6.
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What is the molality of a solution prepared by dissolving 86.9 g of diethyl
ether, C4H10O, in 425 g of benzene, C6H6?
A) | 2.76 m | B) | 2.01 m | C) | 0.362
m | D) | 0.498 m |
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7.
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A volatile liquid would
A) | have a low vapor pressure at room temperature | B) | have weak attractive
forces between molecules | C) | evaporate slowly at room
temperature | D) | have strong attractive forces between molecules |
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8.
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Which of the following kinds of intermolecular forces is found in all
molecules?
A) | dipole-dipole interactions | B) | London forces | C) | hydrogen
bonding | D) | they are all present in all molecules |
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9.
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Which of the following compounds has the greatest lattice energy?
A) | LiBr (s) | B) | MgO (s) | C) | NaI
(s) | D) | CaS (s) |
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10.
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What is the molality of a solution prepared by dissolving 10.0 g of NaCl in 325
g of water?
A) | 30.8 m | B) | 0.0308 m | C) | 0.526
m | D) | 0.000526 m |
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11.
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What is the molecular shape of SCl3F as predicted by the VSEPR
theory?
A) | T-shaped | B) | tetrahedral | C) | see-saw | D) | square
pyramidal |
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12.
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Diethyl ether has a vapor pressure of 400.0 torr at 18 °C. When a
sample of benzoic acid is dissolved in 500.0 g of diethyl ether, the vapor pressure of the solution
is 342 torr. What is the mole fraction of benzoic acid in solution?
A) | 0.0169 | B) | 0.0197 | C) | 0.145 | D) | 0.855 |
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13.
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In which of the following liquids would London forces be the predominant
intermolecular force?
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14.
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Which of the following statements is CORRECT?
A) | a hydrogen bond is an extremely weak dipole-dipole interaction | B) | hydrogen bonding
occurs between any two hydrogen-containing molecules | C) | London forces are “instantaneous”
dipole-dipole interactions | D) | dipole-dipole interactions occur only between
non-polar molecules |
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15.
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What is the hybridization for the Xe in
XeF4?
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Problem
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16.
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Use bond energy data from Table 9.5 in your text to calculate enthalpy for the
reaction shown below:
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