Some chemical reactions of organic compounds
2 marks · NormalState the type of reaction for each of the following. Give your answers as 'addition', 'substitution', or 'combustion'.
Methane reacts with chlorine to form chloromethane and hydrogen chloride.
Ethanol burns in oxygen to produce carbon dioxide and water.
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(a) substitution
(b) combustion
Common mistakes: Confusing substitution and addition; forgetting that burning means combustion.
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Marking points
B1 (a) · 1 mark · Correctly identifies reaction as substitution.
B1 (b) · 1 mark · Correctly identifies reaction as combustion.
Worked solution
a) Methane with chlorine: one atom is replaced by another, so this is a substitution reaction.
b) Ethanol burning is a reaction with oxygen producing carbon dioxide and water; this is combustion.