This definitions covers Key Definitions within Combustion for GCSE Chemistry. Revise Combustion in Organic Chemistry for GCSE Chemistry with 25 exam-style questions and 15 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 7 of 13 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Topic position
Section 7 of 13
Practice
25 questions
Recall
15 flashcards
📖 Key Definitions
Complete combustion: The reaction of a fuel with excess (plentiful) oxygen, producing only carbon dioxide and water as products, with maximum energy release. Produces a blue, clean flame.
Incomplete combustion: The reaction of a fuel with limited oxygen, producing carbon monoxide (CO) and/or solid carbon (soot) in addition to water. Produces a yellow/orange smoky flame and less energy than complete combustion.
Carbon monoxide (CO): A toxic, colourless, odourless gas produced during incomplete combustion. It binds to haemoglobin in red blood cells more strongly than oxygen, preventing oxygen transport and causing death.
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Read this section alongside the surrounding pages in Combustion. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Combustion
What are the only products formed during the complete combustion of a hydrocarbon?
Explain why carbon monoxide (CO) is toxic to humans. [3 marks]
Quick Recall Flashcards
25 questions on Combustion — practise free
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