Which of the following polymer contains fluorine.

Options

A. Thiokol
B. Silicon
C. Teflon
D. SBR

Answer

To determine which polymer contains fluorine, we will analyze the given options step by step.

### Step 1: Identify the polymers listed
The question mentions several polymers. We will examine each one to see if they contain fluorine.

### Step 2: Analyze Thiochrome
- **Thiochrome**: The monomer units for thiochrome rubber are 1,2-dichloroethane and sodium polysulfide.
- **Fluorine Content**: There is no fluorine present in these monomer units.

**Conclusion**: Thiochrome does not contain fluorine.

### Step 3: Analyze Teflon
- **Teflon**: The polymer is derived from tetrafluoroethylene (C2F4).
- **Fluorine Content**: The structure of tetrafluoroethylene contains fluorine atoms (specifically, it has four fluorine atoms).

**Conclusion**: Teflon contains fluorine.

### Step 4: Analyze SBR (Styrene-Butadiene Rubber)
- **SBR**: The monomer units for SBR are styrene and butadiene.
- **Fluorine Content**: Neither styrene nor butadiene contains fluorine in their structures.

**Conclusion**: SBR does not contain fluorine.

### Step 5: Final Conclusion
After analyzing all the polymers:
- Thiochrome: No fluorine
- Teflon: Contains fluorine
- SBR: No fluorine

Thus, the polymer that contains fluorine is **Teflon**.

### Answer:
**Teflon contains fluorine.**

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