Which of the following is an amorphous solid ?

Options

A. Graphite (C)
B. Quartz glass ` (SiO_(2))`
C. Chrome alum
D. Silicon carbide (SiC)

Answer

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

### Step-by-Step Solution:

1. **Define Amorphous and Crystalline Solids**:
- Amorphous solids lack a long-range order in their arrangement of particles. They do not have a definite melting point and their properties can vary from one part of the solid to another.
- Crystalline solids, on the other hand, have a well-defined, orderly arrangement of particles. They possess a fixed melting point and their physical properties are uniform throughout the solid.

2. **Identify the Options**:
- We need to analyze the options given in the question. The options typically include various substances, such as metals, minerals, and synthetic materials.

3. **Analyze Each Option**:
- **Graphite**: This is a crystalline solid made of carbon atoms arranged in a hexagonal lattice.
- **Quartz (SiO2)**: This is also a crystalline solid with a well-defined structure.
- **Chromium Alum**: This is another crystalline solid, consisting of a specific arrangement of ions.
- **Silicon Carbide**: This can exist in both crystalline and amorphous forms, but the amorphous form is often referred to in certain contexts.

4. **Determine the Amorphous Solid**:
- Among the options, Silicon Carbide is recognized as an amorphous solid when it is in its non-crystalline form. The other three options (Graphite, Quartz, and Chromium Alum) are crystalline solids.

5. **Conclusion**:
- Therefore, the correct answer to the question "Which of the following is an amorphous solid?" is **Silicon Carbide**.