Which of the following is an amorphous solid

Options

A. glass
B. diamond
C. salt
D. sugar

Explanation

To determine which of the given options is an amorphous solid, we need to understand the definitions and characteristics of amorphous and crystalline solids.

### Step-by-Step Solution:

1. **Define Amorphous Solids**: Amorphous solids are materials that lack a well-defined long-range order or a regular arrangement of atoms. They do not have a sharp melting point and tend to soften over a range of temperatures. Common examples include glass and certain plastics.

2. **Analyze the Options**:
- **Option A: Glass**: Glass is a well-known example of an amorphous solid. It does not have a regular crystalline structure and is formed by cooling molten materials rapidly.
- **Option B: Diamond**: Diamond is a crystalline solid. It has a very structured arrangement of carbon atoms in a three-dimensional lattice, which gives it its hardness and specific melting point.
- **Option C: Salt**: Salt (sodium chloride) is also a crystalline solid. It has a regular arrangement of ions in a lattice structure.
- **Option D: Sugar**: Sugar (sucrose) is another example of a crystalline solid. It has a defined structure and arrangement of molecules.

3. **Conclusion**: Among the options provided, only glass is classified as an amorphous solid. Therefore, the correct answer is **Option A: Glass**.

### Final Answer:
**The amorphous solid among the options is Glass (Option A).**