Which is an example of thermo setting polymer

Options

A. Polythene
B. PVC
C. Neoprene
D. Bakelite

Answer

To determine which of the given options is an example of a thermosetting polymer, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Polymers**:
- Polymers are large molecules made up of repeating structural units (monomers). They can be classified into two main categories: thermoplastics and thermosetting polymers.

2. **Identifying Thermoplastics vs Thermosetting Polymers**:
- **Thermoplastics**: These polymers can be melted and re-molded multiple times without significant chemical change. They remain soft when heated.
- **Thermosetting Polymers**: These polymers, once set into a given shape, cannot be remolded or melted. They become hard and rigid upon heating and do not soften upon reheating.

3. **Analyzing the Options**:
- **Polythene**: This is a thermoplastic polymer. It can be melted and reshaped, making it unsuitable as an example of a thermosetting polymer.
- **PVC (Polyvinyl Chloride)**: This is also a thermoplastic polymer. It can be recycled and reshaped, thus it does not qualify as a thermosetting polymer.
- **Neoprene**: This is a type of synthetic rubber, which is classified as a thermoplastic polymer. It can be reshaped when heated.
- **Bakelite**: This is a well-known thermosetting polymer. Once it is set, it cannot be remolded or melted, and it is known for its high resistance to heat and electrical conductivity.

4. **Conclusion**:
- Among the options provided, **Bakelite** is the only example of a thermosetting polymer.

### Final Answer:
**Bakelite is an example of a thermosetting polymer.**

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