Which of the following is not a thermoplastic polymer ?

Options

A. nylon
B. PVC
C. polythene
D. bakelite

Answer

To determine which of the following is not a thermoplastic polymer, we need to understand the difference between thermoplastic and thermosetting polymers.

### Step-by-Step Solution:

1. **Identify the Types of Polymers**:
- There are two main types of polymers: thermoplastic and thermosetting.
- Thermoplastic polymers can be remolded and reshaped upon heating.
- Thermosetting polymers cannot be remolded once they are set.

2. **Definition of Thermosetting Polymers**:
- Thermosetting polymers are those that, once formed into a shape, cannot be reshaped or remolded upon heating.
- An example of a thermosetting polymer is Bakelite.

3. **Identify the Given Options**:
- The question likely provides a list of polymers.
- You need to identify which polymer in the list is a thermosetting polymer.

4. **Analyze Each Option**:
- For each polymer in the list, determine whether it is a thermoplastic or a thermosetting polymer.
- If you find a polymer that cannot be remolded upon heating, that is your answer.

5. **Conclusion**:
- After analyzing the options, the polymer that is identified as a thermosetting polymer (like Bakelite) is the one that is not a thermoplastic polymer.