Answer:
Catalytic converters are fitted into automobiles for reducing emission of poisonous gases like CO and\[N{{O}_{2}}\]. These catalytic converters are manufactured using expensive metals like platinum - palladium and rhodium as catalysts. As the exhaust passes through catalytic converter, following changes occur in it.
(i) Unburnt hydrocarbons get completely burnt into \[C{{O}_{2}}\]and\[{{H}_{2}}O\]. (ii) Carbon monoxide and nitric oxide get converted into less polluting gases, i.e. \[C{{O}_{2}}\]and\[{{N}_{3}}\], respectively.
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