Read the following two statements carefully and choose the correct option: Statement I: When methane reacts with chlorine in the presence of sunlight, hydrogen atoms in methane are gradually replaced by chlorine atoms. Statement II: The reaction between methane and chlorine is called an addition reaction.
Only Statement I is correct.
When methane reacts with chlorine in the presence of sunlight, the hydrogen atoms of methane are progressively replaced, one by one, with chlorine atoms, forming chloromethane, dichloromethane, chloroform, and finally carbon tetrachloride.
This process, where an atom or group in a compound is replaced by another atom or group, is known as a substitution reaction, so Statement I correctly describes the reaction.
Statement II is incorrect because this reaction is a substitution reaction and not an addition reaction, since addition reactions involve the addition of atoms across a multiple bond, such as in unsaturated hydrocarbons, which is not the case here.
Hence, only Statement I is correct, since methane reacts with chlorine through substitution and not addition.
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