Alkanes

1 mark · Easy

State the type of reaction that takes place when methane reacts with chlorine in the presence of ultraviolet light.

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Substitution reaction

Also accept: Substitution; Substitution reaction; A substitution reaction

Common mistakes: Addition reaction; Combustion

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Marking points

B1 · 1 mark · Correctly states 'substitution reaction' or 'substitution'.

Worked solution

The reaction is a substitution reaction, as chlorine atoms replace hydrogen atoms in methane in the presence of UV light.