Question

Which of the following statements accurately represents the role of catalytic converters in reducing atmospheric pollution caused by automobiles?

1. Catalytic converters increase the emission of poisonous gases by automobiles, contributing to air pollution.
2. Catalytic converters utilize expensive metals as catalysts to convert unburnt hydrocarbons into carbon dioxide and water.
3. Catalytic converters are primarily responsible for releasing harmful particulate matter into the atmosphere, leading to respiratory issues in humans.

• A. i, ii
• B. ii, iii
• C. ii only
• D. i only

Answer 1

Answer:

C. ii only

Catalytic converters

• Catalytic converters are essential components fitted into automobiles to reduce the emission of poisonous gases into the atmosphere.
• These converters use precious metals, including platinum-palladium and rhodium, as catalysts.
• As the exhaust passes through the catalytic converter, it facilitates the conversion of unburnt hydrocarbons into carbon dioxide and water.
• Additionally, it changes carbon monoxide and nitric oxide into carbon dioxide and nitrogen gas, respectively.
• These processes contribute to the reduction of harmful emissions, promoting a cleaner and healthier environment.
• It is important to use unleaded petrol with vehicles equipped with catalytic converters, as lead in petrol can inactivate the catalyst.