Which of the following is used to make 'non-stick' cookware?

Options

A. PVC
B. Polystyrene
C. Polyethylene terephthalate
D. Poly tetrafluoroethylene

Explanation

To determine which polymer is used to make 'non-stick' cookware, we can analyze the given options step by step.

### Step 1: Identify the options
The options provided are:
1. PVC (Polyvinyl Chloride)
2. Polystyrene
3. Polyethylene Terephthalate
4. Polytetrafluoroethylene

### Step 2: Analyze each option

**Option 1: PVC (Polyvinyl Chloride)**
- PVC is a polymer commonly used in applications like piping, blood bags, and cable insulation.
- It is not used for non-stick cookware.
- **Conclusion**: Incorrect option.

**Option 2: Polystyrene**
- Polystyrene is a polymer derived from styrene and is often used in packaging and insulation.
- It is not suitable for non-stick cookware.
- **Conclusion**: Incorrect option.

**Option 3: Polyethylene Terephthalate**
- Polyethylene Terephthalate (PET) is used for making containers for liquids and foods, as well as fibers for clothing.
- It is not used in non-stick cookware.
- **Conclusion**: Incorrect option.

**Option 4: Polytetrafluoroethylene**
- Polytetrafluoroethylene (PTFE) is a polymer formed from tetrafluoroethylene.
- It is commonly known as Teflon and is specifically used as a non-stick coating for cookware.
- **Conclusion**: Correct option.

### Final Answer
The polymer used to make 'non-stick' cookware is **Polytetrafluoroethylene (PTFE)**, also known as Teflon.

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