Out of o-nitrophenol and p-nitrophenol, which is more volatile ? Explain?

Explanation

To determine which compound, o-nitrophenol or p-nitrophenol, is more volatile, we need to analyze their structures and the types of hydrogen bonding they can form.

### Step-by-Step Solution:

1. **Identify the Structures**:
- **o-Nitrophenol**: In o-nitrophenol, the nitro group (-NO2) is positioned ortho (adjacent) to the hydroxyl group (-OH) on the benzene ring.
- **p-Nitrophenol**: In p-nitrophenol, the nitro group is positioned para (opposite) to the hydroxyl group on the benzene ring.

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