Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into :  
(A) carbon dioxide and water
(B) carbon monoxide
(C) methane
(D) carbon dioxide and methane

Options

A. carbon dioxide and water
B. carbon monoxide
C. methane
D. carbon dioxide and methane

Answer

A

Explanation

Catalytic converters are fitted into automobiles for reducing emission of poisonous gases.
Catalytic converters have expensive metals namely (i) platinum (ii) palladium and (iii) rhodium (iv) (Pt-Pd and Rh) as catalysts.
As the exaust passes through the catalytic converter: (i) Unburnt hydrocarbons are converted into `CO_(2)` and `H_(2)O`. (ii) Carbon monoxide is changed to `CO_(2)`. (iii) Nitric oxide (NO) is changed to N gas.
Vehicles equipped with catalytic converters should use unleaded petrol because lead in the petrol inactivates the catalyst.