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Question

When a chlorine atom replaces a hydrogen atom in a methane molecule, it is categorised as a/an reaction.

A
elimination
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B
addition
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C
substitution
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Solution

The correct option is C substitution
Chlorine (Cl2) replaces a hydrogen atom in methane (CH4) very quickly in the presence of sunlight to give chloromethane (CH3Cl). This type of reaction is called substitution reaction.
CH4(g)+Cl2(g) sunlight−−−CH3Cl(g)+HCl(g)

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