Which is/are not amorphous solid(s)?

Options

A. Rubber
B. Graphite
C. Glass
D. Plastics

Answer

To determine which of the given options is not an amorphous solid, we first need to understand the characteristics of amorphous solids and crystalline solids.

### Step-by-Step Solution:

1. **Define Amorphous Solids**:
- Amorphous solids are materials that lack a long-range order or a well-defined geometric structure. They have a random arrangement of their constituent particles (atoms, molecules, or ions).

2. **Identify the Options**:
- The options provided are:
1. Rubber
2. Graphite
3. Glass
4. Plastic

3. **Analyze Each Option**:
- **Rubber**: Rubber is an amorphous solid. It has a random arrangement of molecules and does not have a definite crystalline structure.
- **Graphite**: Graphite is a crystalline solid. It has a layered structure with a regular arrangement of carbon atoms in a hexagonal lattice. Therefore, it is not an amorphous solid.
- **Glass**: Glass is also an amorphous solid. It has a disordered arrangement of atoms and does not form a crystalline structure.
- **Plastic**: Most plastics, such as polyethylene, are considered amorphous solids due to their random molecular arrangement.

4. **Conclusion**:
- Among the given options, **graphite** is the only material that is not an amorphous solid; it is a crystalline solid.

### Final Answer:
Graphite is not an amorphous solid.

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