Practice Quiz

MCAS Chemistry Exam Practice - Question List

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81. Which of the following substances has the highest concentration of hydrogen ions in solution?
  1. bleach - pH 13
  2. water - pH 7
  3. tomato juice - pH 4
  4. vinegar - pH 3
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82. Which of the following is an example of nuclear fusion?
  1. Hydrogen-1 and hydrogen-2 combine to form helium-3.
  2. Polonium-210 decays into lead-206 and an alpha particle.
  3. Carbon-14 breaks down into a beta particle and nitrogen-14.
  4. Uranium-235 and a neutron produce barium-141, krypton-92, and three neutrons.
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83. Which of the following has the greatest mass?
  1. 1 mole of H2
  2. 2 moles of K
  3. 3 moles of Mg
  4. 4 moles of He
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84. Based on its position on the periodic table, which of the following elements is a nonmetal?
  1. potassium (K)
  2. vanadium (V)
  3. nickel (Ni)
  4. bromine (Br)
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