Write the reaction of chlorine with ethyne in the absence of light

Explanation

To write the reaction of chlorine with ethyne in the absence of light, we follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are ethyne (C₂H₂) and chlorine (Cl₂).

### Step 2: Understand the Reaction Type
In the absence of light, chlorine reacts with ethyne through an addition reaction. This means that the chlorine molecules will add across the triple bond of ethyne.

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