The entire crystal of silica `(SiO_(2))` is considered as a giant
molecule in which `………………` membered rings are formed
with alternate silicon and oxygen atoms.

Options

A. six
B. eight
C. four
D. ten

Explanation

To solve the question about the structure of silica (SiO₂) and the type of rings formed by silicon and oxygen atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Silica (SiO₂)**:
- Silica, or silicon dioxide, is a compound made up of silicon (Si) and oxygen (O) atoms. It is a major component of the Earth's crust and is commonly found in nature.

2. **Structure of Silica**:
- The structure of silica is characterized by a three-dimensional network. Each silicon atom is covalently bonded to four oxygen atoms in a tetrahedral arrangement.

3. **Formation of Rings**:
- In the crystal structure of silica, these tetrahedra share their corners with neighboring tetrahedra, leading to the formation of rings.

4. **Identifying the Type of Rings**:
- The question specifically asks about the number of members in the rings formed by alternating silicon and oxygen atoms. In the case of silica, these rings are typically 8-membered rings.

5. **Conclusion**:
- Therefore, the entire crystal of silica can be considered as a giant molecule in which 8-membered rings are formed with alternate silicon and oxygen atoms.

### Final Answer:
The entire crystal of silica (SiO₂) is considered as a giant molecule in which **8-membered** rings are formed with alternate silicon and oxygen atoms.

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