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Catalysts
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Catalysts

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Questions and Answers

Which of the following best describes a catalyst?

  • A substance that makes chemical reactions faster without changing its structure or concentration (correct)
  • A substance that increases the concentration of a chemical reaction
  • A substance that changes its structure during a chemical reaction
  • A substance that slows down chemical reactions

    • What is the main purpose of a catalytic converter in an automobile?

  • To increase the concentration of pollutants in the exhaust system
  • To reduce the amount of pollutants in the exhaust system (correct)
  • To increase the fuel efficiency of the engine
  • To increase the speed of the car

    • Which of the following gases are produced as a result of oxidation-reduction reactions in a catalytic converter?

  • Oxygen, nitrogen, and sulfur dioxide
  • Methane, carbon dioxide, and nitrogen
  • Carbon monoxide, residual hydrocarbons, and nitrogen oxides
  • Carbon dioxide, oxygen, and nitrogen (correct)

    • What are the precious metals used in a catalytic converter?

    <p>Platinum, palladium, and rhodium</p> Signup and view all the answers

    What happens to pollutants like carbon monoxide and nitrogen oxides when they go through a catalytic converter?

    <p>They are converted into harmless gases</p> Signup and view all the answers

    What is the significance of the discovery of catalysts in the late nineteenth century?

    <p>It led to the creation of the catalytic converter</p> Signup and view all the answers

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