Question

Which of the following statements are correct?
(i) Catalytic converters convert unburnt hydrocarbons into $CO_2$ and $H_2O$.
(ii) The catalytic converter converts carbon monoxide and nitric oxide into $CO_2$ and $N_2$
(iii) Automobiles are the major cause of atmospheric pollution in the world.
(iv) Proper maintenance of automobiles along with the use of lead-free petrol or diesel cannot reduce the pollutants they emit.
(v) In India, the Air (Prevention and Control of Pollution) Act came into force in 1981 amended in 1987 to include noise as air pollutants.

• A. (i), (ii), (iv) and (v)
• B. (i), (ii), (iii) and (v)
• C. (iii), (iv) and (v)
• D. (i), (ii) and (iii)

Answer 1

Answer: (B)

A catalytic converter is fitted in automobiles to reduce the emission of harmful gases. They are fitted with heavy metals like platinum, palladium and rhodium which act as catalysts and convert unburnt hydrocarbons into $CO_2$ and $H_2O$convert carbon monoxide and nitric oxide into $CO_2$ and $N_{2 .\,\text{However}}$, the use of unleaded petrol is necessary as the lead in petrol inactivates the catalyst.