Practice Quiz

MCAT Biology - Question List

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226. Which of the following describes the separation of the components of a mixture?
  1. Water is broken down into hydrogen and oxygen.
  2. Salt is isolated from seawater through evaporation.
  3. Propane reacts with oxygen to form carbon dioxide and
    water.
  4. Calcium carbonate decomposes to form calcium oxide and carbon dioxide.
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227. Which of the following elements has the greatest electronegativity?
  1. hydrogen (H)
  2. fluorine (F)
  3. astatine (At)
  4. francium (Fr)
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228. 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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229. 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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230. 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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