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Questions and Answers
Which of the following best describes a catalyst?
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?
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?
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?
What are the precious metals used in a catalytic converter?
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What happens to pollutants like carbon monoxide and nitrogen oxides when they go through a catalytic converter?
What happens to pollutants like carbon monoxide and nitrogen oxides when they go through a catalytic converter?
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What is the significance of the discovery of catalysts in the late nineteenth century?
What is the significance of the discovery of catalysts in the late nineteenth century?
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