Catalytic converters do not convert

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sulphur dioxide to sulphur

Nitric oxide to nitrogen gas

carbon monoxide to carbon dioxide

hydrocarbons to carbon dioxide and water

answer is C.

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Detailed Solution

Sulphur dioxide is not removed by catalytic converters.

As the exhaust passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and water, and carbon monoxide and nitric oxide are changed to carbon dioxide and nitrogen gas, respectively.

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