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

Catalytic converters are fitted into automobiles to reduce the emissions of harmful and poisonous gases. It has platinum-palladium (Pt-Pd) and rhodium (Rh) as catalysts.

When the exhaust gases passes through the catalytic converters, the unburnt hydrocarbons are oxidised into Carbon dioxide and water, carbon monoxide into carbon dioxide and nitric oxide into Nitrogen gas.