Practice Quiz

MCAS Chemistry Exam Practice - Question List

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51. Which of the following statements accurately describes alpha particles in terms of charge and mass?
  1. Alpha particles are positively charged and less massive than
    beta particles.
  2. Alpha particles are negatively charged and less massive than beta particles.
  3. Alpha particles are positively charged and more massive than beta particles.
  4. Alpha particles are negatively charged and more massive than beta particles.
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52. A gas enters a compressor where it is converted to a liquid. Which of the following happens to the gas as it becomes a liquid?
  1. It loses mass.
  2. It releases heat.
  3. It loses protons.
  4. It releases electricity.
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53. Which of the following examples is evidence of a physical change?
  1. Ice cream melts in a bowl.
  2. A silver spoon tarnishes over time.
  3. An electrical current splits water into hydrogen and oxygen.
  4. A person inhales oxygen and exhales carbon dioxide and water.
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54. Which of the following statements describes properties of most metals?
  1. They have high melting and boiling points.
  2. They accept electrons to form negative ions.
  3. They have densities lower than that of water.
  4. They share electrons to form covalent bonds.
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55. Which of the following statements explains how a buffer maintains pH when small amounts of a strong base are added?
  1. The salt in the buffer absorbs the base.
  2. The water in the buffer dilutes the base.
  3. The weak acid of the buffer neutralizes the base.
  4. The weak base of the buffer neutralizes the base.
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