Distinction between pairs of compounds
Benzene and phenol.

Explanation

### Step-by-Step Solution

**Step 1: Define the Compounds**
- Benzene (C6H6) is a simple aromatic hydrocarbon with a stable ring structure and delocalized π-electrons.
- Phenol (C6H5OH) is an aromatic compound that contains a hydroxyl (-OH) group attached to the benzene ring.

**Step 2: Acid-Base Reaction**
- **Benzene**: Benzene does not exhibit acidic properties and does not react with bases like NaOH or KOH.
...