Practice Quiz

CLEP Chemistry Practice Test - Question List

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56. Which of the following trends in the periodic table should be expected as the atomic number of the halogens increases from fluorine (F) to iodine (I)?
  1. Atomic radius decreases.
  2. Electronegativity decreases.
  3. Atomic mass decreases.
  4. Electron number decreases.
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57. Which of the following statements describes the elements in family 16 of the periodic table?
  1. They have six valence electrons.
  2. They are all gases at room temperature.
  3. They exist commonly as cations in nature.
  4. They combine easily with elements in family 17.
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58. What is the volume of one mole of hydrogen gas (H2) at standard temperature and pressure (STP)?
  1. 1.0 L
  2. 2.0 L
  3. 22.4 L
  4. 44.8 L
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59. As heat is slowly added to a glass of ice water, the temperature remains at 0°C. Which of the following statements explains why the temperature of the mixture of ice and water remains constant as heat is added?
  1. Heat is stored in the solid ice.
  2. Heat is stored in the liquid water.
  3. Heat is used to turn the solid ice into liquid water.
  4. Heat is absorbed equally by thesolid ice and the liquid water.
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60. Which statement below best describes what happens when sodium chloride, NaCl, is dissolved in water?
  1. The NaCl separates into Na+ and Cl- ions.
  2. The NaCl separates into uncharged Na and Cl.
  3. The NaCl reacts with water to form NaH and HCl.
  4. The NaCl reacts with water to form NaOH and Cl2.
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