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Question

The incomplete combustion of petrol or diesel leads to the emission of which poisonous gas-

A
Carbon dioxide
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B
Carbon monoxide
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C
Methane
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D
Ozone
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Solution

The correct option is D Carbon monoxide
When petrol or diesel goes through the complete combustion then it forms carbon dioxide and water molecules.
2C8H18+25O216CO2+18H2O.
But when the supply of air/oxygen is poor then incomplete combustion occur. In incomplete combustion water is still produced, but carbon monoxide and un-burnt carbon particles are released instead of carbon dioxide. Carbon monoxide is a poisonous gas which can lead to many diseases.
In general, for incomplete combustion:
Hydrocarbon + oxygen carbon monoxide + carbon + water.

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