Bakelite is an example of

Options

A. elastomer
B. fibre
C. thermoplastic
D. thermosetting .

Explanation

To determine what type of polymer Bakelite is, let's analyze the options provided in the question step by step.

### Step 1: Understanding the Options
The options given are:
1. Elastomer
2. Fibre
3. Thermoplastic
4. Thermosetting plastic

### Step 2: Analyzing Each Option
- **Elastomer**: Elastomers are polymers that have elastic properties, meaning they can stretch and return to their original shape. A common example is rubber. Since Bakelite does not have elastic properties, it cannot be classified as an elastomer.

- **Fibre**: Fibres are thin strands used to make fabrics. Examples include cotton and polyester. Bakelite is not thin or thread-like and is not used to make fabrics, so it cannot be classified as a fibre.

- **Thermoplastic**: Thermoplastics are polymers that can be melted and reshaped upon heating. They have linear or slightly branched structures. Examples include polythene and PVC. Bakelite does not soften upon heating; instead, it hardens permanently, so it is not a thermoplastic.

- **Thermosetting plastic**: Thermosetting plastics are polymers that, once set into a given shape, cannot be remolded or softened by heating. They have heavily branched structures and become hard and infusible upon heating. Bakelite fits this description perfectly as it is known for its rigidity and inability to be reshaped once cured.

### Step 3: Conclusion
Based on the analysis of each option, Bakelite is best classified as a **thermosetting plastic**.

### Final Answer
Bakelite is an example of **thermosetting plastic**.

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