p-methoxyaniline is a stronger base than aniline but p-nitroaniline is a weaker base than aniline. Explain.

Explanation

To understand why p-methoxyaniline is a stronger base than aniline, while p-nitroaniline is a weaker base than aniline, we need to analyze the effects of the substituent groups on the aniline structure.

### Step-by-Step Solution:

1. **Identify the Structures**:
- **Aniline**: The base structure is C6H5NH2.
- **p-Methoxyaniline**: The methoxy group (-OCH3) is attached to the para position of the aniline ring.
- **p-Nitroaniline**: The nitro group (-NO2) is attached to the para position of the aniline ring.
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