Which is an example of thermosetting plastic?

Options

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

Answer

To determine which of the given options is an example of a thermosetting plastic, we can follow these steps:

### Step 1: Understand the Definition of Thermosetting Plastics
Thermosetting plastics are polymers that, once set into a solid form, cannot be remelted or reshaped. They undergo a chemical change when heated, which makes them hard and rigid.

### Step 2: Analyze the Options
We have the following options:
- Option A: Polythene
- Option B: PVC (Polyvinyl Chloride)
- Option C: Neoprene
- Option D: Bakelite

### Step 3: Classify Each Option
- **Polythene**: This is a thermoplastic, meaning it can be melted and reshaped multiple times.
- **PVC**: This is also a thermoplastic, which can be remelted and reshaped.
- **Neoprene**: This is a synthetic rubber that is generally classified as a thermoplastic.
- **Bakelite**: This is a thermosetting plastic. Once it is set, it cannot be remelted or reshaped.

### Step 4: Identify the Correct Answer
From the analysis, Bakelite is the only option that fits the definition of a thermosetting plastic.

### Conclusion
The correct answer is **Option D: Bakelite**.

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