The chemical name of salt petre is

Options

A. sodium nitrate
B. sodium nitrite
C. potasslum nitrate
D. potassium nitrite

Answer

To determine the chemical name of saltpetre, we will analyze the options provided and identify the correct one based on the information available.

### Step-by-Step Solution:

1. **Understanding Saltpetre**:
- Saltpetre is commonly known as a substance used in various applications, including fertilizers and food preservation.

2. **Evaluating the Options**:
- **Option A: Sodium Nitrate (NaNO3)**: This is a chemical compound that is often confused with saltpetre, but it is not the correct name for saltpetre.
- **Option B: Sodium Nitrite (NaNO2)**: This compound is used in different applications, such as in food preservation and as a dye, but it is not saltpetre.
- **Option C: Potassium Nitrate (KNO3)**: This is the correct chemical name for saltpetre. It is widely used in fertilizers and food preservation.
- **Option D: Potassium Nitrite (KNO2)**: This compound is used as an antidote in cyanide poisoning but is not saltpetre.

3. **Conclusion**:
- Based on the evaluation of the options, the chemical name of saltpetre is **Potassium Nitrate (KNO3)**.

### Final Answer:
The chemical name of saltpetre is **Potassium Nitrate (KNO3)**.

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