Give reasons for the following in one or two sentences`:`
`i.` Methane does not react with chlorine in dark.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Reaction**: The reaction between methane (CH₄) and chlorine (Cl₂) does not occur in the dark. This is because the reaction requires a specific mechanism to proceed.

2. **Free Radical Mechanism**: The reaction between methane and chlorine follows a free radical mechanism, which involves the formation of free radicals. This mechanism is initiated by the presence of light.

3. **Role of Light**: In the presence of light, chlorine molecules (Cl₂) undergo homolytic cleavage to form chlorine radicals (Cl·). This is the initiation step of the free radical mechanism.

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