The chemical name of sand is

Options

A. silicon
B. sodium silicate
C. silicon dioxide
D. calcium silicate

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the chemical name of sand. We need to identify which of the given options correctly represents the chemical composition of sand.

2. **Analyzing the Options**: The options provided are:
- Option A: Silicon
- Option B: Sodium Silicate
- Option C: Silicon Dioxide
- Option D: Calcium Silicate

3. **Identifying the Main Component of Sand**: Sand is primarily composed of silicon dioxide (SiO2). This is the most common form of sand found in nature.

4. **Evaluating Each Option**:
- **Option A: Silicon** - This is just the element silicon and does not represent sand.
- **Option B: Sodium Silicate** - This is a compound that contains sodium and silicon but is not the chemical name for sand.
- **Option C: Silicon Dioxide** - This is the correct chemical name for sand, as it consists of silicon and oxygen in a 1:2 ratio.
- **Option D: Calcium Silicate** - This is another compound but does not represent sand.

5. **Conclusion**: Based on the analysis, the correct answer is **Option C: Silicon Dioxide**.

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