Quartz is extensively used as a piezoelectric material, it contains ……….

Options

A. Pb
B. Si
C. Ti
D. Sn

Explanation

**Step-by-Step Solution:**

1. **Understanding Piezoelectric Materials:**
- A piezoelectric material is one that generates an electric charge when subjected to mechanical stress. This property is crucial for various applications, including sensors and actuators.

2. **Identifying the Composition of Quartz:**
- Quartz is a mineral composed primarily of silicon dioxide (SiO2). It is one of the most abundant minerals in the Earth's crust.

3. **Recognizing the Forms of Silicon:**
- Silicon exists in several crystalline forms, but the three most notable crystalline forms are:
- Quartz (SiO2)
- Cristobalite
- Tridymite
- Among these, quartz is the most commonly used form.

4. **Establishing the Connection:**
- Since quartz is a crystalline form of silicon dioxide, we can conclude that quartz contains silicon as a primary component.

5. **Final Conclusion:**
- Therefore, the answer to the question is that quartz, which is extensively used as a piezoelectric material, contains silicon.

**Answer: Quartz contains silicon.**

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