Conversion of Ethylene into Acetylene

Explanation

To convert ethylene (C2H4) into acetylene (C2H2), we can follow these steps:

### Step 1: Bromination of Ethylene
- Start with ethylene (C2H4), which has the structure CH2=CH2.
- Treat ethylene with bromine (Br2) in carbon tetrachloride (CCl4). This is an electrophilic addition reaction.

**Reaction:**
\[ \text{CH}_2= \text{CH}_2 + \text{Br}_2 \xrightarrow{\text{CCl}_4} \text{CH}_2\text{Br}-\text{CH}_2\text{Br} \]
...