Ortho nitrophenol has …………..hydrogen bond while p-nitrophenol has …………hydrogen bond.

Explanation

To solve the question regarding the types of hydrogen bonding in ortho-nitrophenol and para-nitrophenol, we can follow these steps:

### Step 1: Understand the Structures
First, we need to understand the structures of ortho-nitrophenol and para-nitrophenol.

- **Ortho-nitrophenol** has the nitro group (-NO2) positioned adjacent to the hydroxyl group (-OH) on the benzene ring.
- **Para-nitrophenol** has the nitro group positioned opposite the hydroxyl group on the benzene ring.

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