Podcast
Questions and Answers
What is the primary purpose of a catalytic converter in cars?
What is the primary purpose of a catalytic converter in cars?
- To reduce noise from the exhaust
- To increase fuel efficiency
- To enhance engine performance
- To reduce pollution from exhaust fumes (correct)
Catalytic converters can convert nitrogen monoxide (NO) into harmless nitrogen (N2).
Catalytic converters can convert nitrogen monoxide (NO) into harmless nitrogen (N2).
True (A)
Name two catalysts used in catalytic converters.
Name two catalysts used in catalytic converters.
Platinum and palladium
The lifetime of a catalytic converter is shortened when using __________ petrol due to poisoning of the catalysts.
The lifetime of a catalytic converter is shortened when using __________ petrol due to poisoning of the catalysts.
Match the harmful gases to their corresponding chemical reactions in a catalytic converter:
Match the harmful gases to their corresponding chemical reactions in a catalytic converter:
Flashcards
What is Octane Number?
What is Octane Number?
A measurement of a fuel's resistance to knocking or premature detonation during combustion.
What is a Catalytic Converter?
What is a Catalytic Converter?
Devices fitted to car exhausts to reduce harmful gases.
What are harmful gases in car exhaust?
What are harmful gases in car exhaust?
Harmful gases emitted from car exhausts, including carbon monoxide (CO), nitrogen oxides (NOx), and unburned hydrocarbons (HC).
What are the catalysts in a catalytic converter?
What are the catalysts in a catalytic converter?
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Why is lead bad for catalytic converters?
Why is lead bad for catalytic converters?
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Study Notes
Octane Number
- Octane number measures a fuel's resistance to knocking
Catalytic Converters
- Fitted to car exhausts to reduce pollution
- Exhaust contains: carbon monoxide, nitrogen monoxide, nitrogen dioxide, lead compounds (if leaded petrol), and unburned hydrocarbons
- Catalytic converters convert harmful gases into harmless ones
- Example: CO + NO → CO₂ + N₂
- Example: CO → CO₂
- Example: NO → N₂
- Catalysts (platinum, palladium, rhodium) are inside a stainless steel honeycomb structure, increasing surface area for gas removal
- Lifetime depends on fuel type (shorter with leaded petrol due to catalyst poisoning)
- EU policy since 1993 mandates catalytic converters on all new cars
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Description
Explore the concepts of octane number and catalytic converters in this quiz. Understand the importance of octane in fuel efficiency and the role of catalytic converters in reducing harmful emissions. Test your knowledge about gases involved and the science behind catalytic processes.
