Why benzoic acid has a sharp melting point but glass does not?

Explanation

To understand why benzoic acid has a sharp melting point while glass does not, we need to delve into the classification of solids and their properties.

### Step-by-Step Solution:

1. **Classification of Solids**:
- Solids are primarily classified into two categories: crystalline solids and amorphous solids.

2. **Crystalline Solids**:
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