State one observation for the following :
Bromine vapours are passed into a solution of ethyne in carbon tetrachloride.

Explanation

To solve the question, we need to analyze the reaction that occurs when bromine vapors are passed into a solution of ethyne (C2H2) in carbon tetrachloride (CCl4). Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Reactants
- Ethyne (C2H2) is an alkyne, which contains a triple bond between the two carbon atoms.
- Bromine (Br2) is a diatomic molecule that can react with unsaturated hydrocarbons like alkynes and alkenes.

**Hint:** Identify the type of compound you are dealing with (alkyne) and its properties.

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