Practice Quiz

MCAS Chemistry Exam Practice - Question List

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76. Which of the following correctly describes a trend from top to bottom in the group 2 (2A) elements on the periodic table?
  1. Ionic radius decreases.
  2. Ionic charge increases.
  3. Atomic radius increases.
  4. Atomic number decreases.
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77. Which of the following occurs when a rigid container of gas is heated?
  1. The pressure inside the container increases.
  2. The pressure inside the container decreases.
  3. The pressure inside the container stays the same.
  4. The pressure inside the container changes the composition of the gas.
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78. Which of the following is the same for both hydrogen and potassium?
  1. atomic mass
  2. total mass of neutrons
  3. number of valence electrons
  4. number of filled energy levels
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79. Which of the following helps explain why honey dissolves more rapidly in hot water than in cold water?
  1. The honey and hot water form more covalent bonds.
  2. The hot water is more chemically reactive with the honey.
  3. The honey breaks down into free atoms more quickly in the hot water.
  4. The greater motion of hot water molecules disperses the honey more quicly.
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80. The addition of 500 J of energy to a block of iron causes a rise in the average kinetic energy of the atoms in the block. Which of the following instruments can best be used to observe this change?
  1. a ruler
  2. a balance
  3. a thermometer
  4. a graduated cylinder
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