AQA GCSE Combined Science Trilogy · 8464
Specification 5.9.3.1 · Paper 4
Revise: Pollutants from CombustionWhen there is not enough oxygen, incomplete combustion occurs. The carbon in the fuel is not fully oxidised to carbon dioxide.
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GCSE Combined Science · key term
Burning with an insufficient oxygen supply, which can produce carbon monoxide, solid carbon and unburned fuel.
Used by AQA and Edexcel
Specification 5.9.3.1 · Paper 4
Revise: Pollutants from CombustionWhen there is not enough oxygen, incomplete combustion occurs. The carbon in the fuel is not fully oxidised to carbon dioxide.
Specification Fuels · Paper 3, Paper 4
Combustion with insufficient oxygen; a hydrocarbon can produce carbon monoxide and carbon as well as water.
Revise: Fuel combustion, pollution and hydrogen alternativesWhen there is not enough oxygen for complete combustion, incomplete combustion occurs. This can happen in engines and in fuel-burning appliances such as boilers and stoves.
For carbon monoxide and soot, state that the oxygen supply is insufficient: incomplete combustion occurs.
Incomplete combustion can produce a mixture of products, including some carbon dioxide. It does not mean that no fuel burns.
Explain incomplete combustion using an insufficient oxygen supply, not simply a low temperature.
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