* Carbon dioxide (CO2): This is the primary product of combustion, formed when the carbon in the petrol combines with oxygen.
* Water (H2O): This is produced when the hydrogen in the petrol combines with oxygen.
* Nitrogen (N2): This is a major component of air and remains largely unchanged during combustion.
* Small amounts of other gases: These include trace amounts of:
* Carbon monoxide (CO): This is a poisonous gas that forms when combustion is incomplete.
* Nitrogen oxides (NOx): These contribute to smog and acid rain.
* Unburnt hydrocarbons: These are leftover fuel components that haven't been fully oxidized.
* Sulphur dioxide (SO2): This is produced from the combustion of sulphur impurities in petrol.
* Particulate matter (PM): These are microscopic solid particles that can contribute to respiratory problems.
Important Note: Complete combustion is an ideal scenario. In reality, combustion is often incomplete, leading to the production of more harmful byproducts like carbon monoxide and particulate matter.
