Metal Refining Methods Quiz
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Questions and Answers

What is the method for refining nickel described in the text?

  • Fractional crystallization
  • Electrolysis
  • Distillation
  • Zone refining (correct)

    • What is the compound formed when impure nickel is heated in a stream of carbon monoxide?

  • Nickel tetracarbonyl (Ni[CO]4) (correct)
  • Nickel carbide (Ni3C)
  • Nickel carbonate (NiCO3)
  • Nickel oxide (NiO)

    • What is the purpose of carrying out zone refining in an inert gas atmosphere?

  • To increase the melting point of impurities
  • To prevent the formation of metal oxides
  • To accelerate the dissolution of impurities
  • To prevent the oxidation of metals (correct)

    • Which elements are commonly refined using the zone refining process?

    <p>Germanium, Silicon, and Gallium</p> Signup and view all the answers

    What happens to the impurities during the zone refining process?

    <p>They dissolve in the molten zone</p> Signup and view all the answers

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