Which of the following does not contain fluorine?

Options

A. Cryolite
B. Chile saltpeter
C. Fluorspar
D. None of the above

Answer

To determine which of the given options does not contain fluorine, we will analyze each option one by one.

### Step 1: Analyze Triolite
- **Definition**: Triolite is a mineral that is classified as a halide.
- **Chemical Composition**: It is known as sodium-aluminum fluoride, with the chemical formula Na3AlF6.
- **Conclusion**: Since it contains fluoride (F), it contains fluorine.

### Step 2: Analyze Chile Saltpeter
- **Definition**: Chile saltpeter is a nitrate salt.
- **Chemical Composition**: Its chemical formula is NaNO3, which indicates it is sodium nitrate.
- **Conclusion**: Sodium nitrate does not contain fluorine, as it is composed of sodium (Na), nitrogen (N), and oxygen (O).

### Step 3: Analyze Fluorispar
- **Definition**: Fluorispar is a mineral that is primarily composed of calcium fluoride.
- **Chemical Composition**: Its chemical formula is CaF2.
- **Conclusion**: Since it contains fluoride (F), it contains fluorine.

### Final Conclusion
After analyzing all three options:
- Triolite contains fluorine.
- Chile saltpeter does not contain fluorine.
- Fluorispar contains fluorine.

Thus, the correct option that does not contain fluorine is **Chile saltpeter** (option B).

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