Particles of quartz are packed by

Options

A. Electrical attraction forces
B. Vander Waal's forces
C. Covalent bond forces
D. Strong electrostatic attraction forces

Explanation

To solve the question "Particles of quartz are packed by," we need to analyze the nature of quartz and how its constituent particles are held together.

### Step-by-Step Solution:

1. **Identify the Nature of Quartz**:
- Quartz is a mineral composed primarily of silicon dioxide (SiO2). It is classified as a covalent solid.

2. **Understand the Bonding in Quartz**:
- In covalent solids, the atoms are bonded together by covalent bonds. This means that the atoms share electrons to achieve stability.

3. **Determine the Type of Forces Present**:
- The forces that hold the particles in quartz together are covalent bonds. These bonds are strong and result in a rigid structure.

4. **Conclusion**:
- Since quartz is a covalent solid, the particles (atoms) of quartz are packed together by covalent bond forces.

Thus, the answer to the question is: **Particles of quartz are packed by covalent bond forces.**