Incomplete combustion of petrol or diesel oil in automobile engines can be best detected by testing the fuel gases for the presence of __________.
A
carbon monoxide and water vapour
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B
carbon monoxide
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C
nitrogen dioxide
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D
sulphur dioxide
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Solution
The correct option is A carbon monoxide The incomplete combustion of petrol and diesel in automobiles produces carbon monoxide. In fuel gases, the presence of carbon monoxide is tested for the confirmation of complete combustion.