Question

Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. They change unburnt hydrocarbons into ______.

Options

• ethane

• carbon monoxide

• carbon dioxide and methane

• carbon dioxide and water

Answer 1

Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. They change unburnt hydrocarbons into carbon dioxide and water.

Explanation:

Catalytic converters use platinum, palladium and rhodium catalysts to oxidize unburnt hydrocarbons in exhaust into carbon dioxide and water; they also oxidize CO and reduce NO_x to harmless gases, thereby cutting poisonous emissions.