The p-isomer of dichlorobenzene has higher melting point than o-and m-isomer. Why?

Explanation

To understand why the para-isomer of dichlorobenzene has a higher melting point than the ortho- and meta-isomers, we can analyze the molecular structures and their properties step by step.

### Step 1: Identify the Isomers
Dichlorobenzene has three isomers:
- **Ortho (o-) isomer**: The two chlorine atoms are adjacent to each other on the benzene ring.
- **Meta (m-) isomer**: The two chlorine atoms are separated by one carbon atom on the benzene ring.
- **Para (p-) isomer**: The two chlorine atoms are opposite each other on the benzene ring.

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