Calgon is an industrial name given to

Options

A. normal sodium phosphate
B. sodium meta-aluminate
C. sodium hexametaphosphate
D. hydrated sodium aluminium silicate

Answer

To solve the question "Calgon is an industrial name given to," we will analyze the options provided and identify the correct one.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which compound is referred to as "Calgon." The options given are:
- Normal sodium phosphate
- Sodium metal aluminate
- Sodium hexametaphosphate
- Hydrated sodium aluminium silicate

2. **Analyze Each Option**:
- **Normal Sodium Phosphate**: This compound does not have an industrial name associated with it. It is commonly used in various applications, but it is not known as Calgon.
- **Sodium Metal Aluminate**: This is simply sodium aluminate, which also does not carry the name Calgon. It is used in various industrial processes but is not referred to as Calgon.
- **Sodium Hexametaphosphate**: This compound is known as Calgon. It is used in water treatment and as a dispersing agent. Its chemical formula is Na6P6O18, which can also be represented as Na2, Na4, PO3 whole 6.
- **Hydrated Sodium Aluminium Silicate**: This compound does not have the name Calgon associated with it either. It is used in various applications but is not the correct answer.

3. **Identify the Correct Answer**: Based on the analysis, the correct answer is **Sodium Hexametaphosphate**, which is industrially known as Calgon.

### Final Answer:
Calgon is an industrial name given to **Sodium Hexametaphosphate**.