Methane reacts with chlorine in the presence of sunlight to form chloromethane (CH₃Cl) and HCl. What type of…

Question

Methane reacts with chlorine in the presence of sunlight to form chloromethane (CH₃Cl) and HCl. What type of reaction is this? Give a reason for your answer.

Accepted Answer

## Model Answer It is a **substitution reaction** because chlorine replaces one hydrogen atom of methane — one type of atom takes the place of another. Source: Chapter 4, Section 4.3.4 – Substitution Reaction --- ## Explanation For a 1-mark question, name the reaction type AND give the reason (what "substitution" means) in one line. Examiners award the mark for correctly identifying it as a substitution reaction with a valid reason. Avoid writing extra details about sunlight or products — that wastes time and adds no marks.

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