Formation of methyl chloride from methane and chlorine gas is which type of reaction?

In substitution reaction, a hydrogen atom from methane (CH4) is replaced by a chlorine atom from chlorine gas (Cl2), forming methyl chloride (CH3Cl) and hydrogen chloride (HCl). This type of reaction, where one atom is replaced by another, is known as a substitution reaction. The chemical equation is: CH4 + Cl2 → CH3Cl + HCl.