Question

# The incomplete combustion of petrol or diesel leads to the emission of which poisonous gas-  Carbon dioxideOzoneMethaneCarbon monoxide

Solution

## The correct option is D Carbon monoxideWhen petrol or diesel goes through the complete combustion then it forms carbon dioxide and water molecules. 2C8H18+25O2→16CO2+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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