Bakelite and polythene are considered as an example of :

Options

A. Thermosetting polymers
B. Elastomers and thermoplastic polymers
C. Thermoplastic polymers
D. Thermosetting and thermoplastic polymers

Answer

To determine the classification of Bakelite and polythene, we need to understand the characteristics of different types of polymers. Here’s the step-by-step solution:

### Step 1: Understand the Types of Polymers
- **Thermoplastic Polymers**: These are polymers that can be melted and re-molded multiple times. They become soft when heated and harden upon cooling. This property allows them to be reshaped without undergoing any chemical change.
- **Thermosetting Polymers**: These polymers undergo a chemical change when heated, which makes them hard and rigid. Once they are set, they cannot be remolded or melted again.

### Step 2: Identify Bakelite and Polythene
- **Bakelite**: This is a type of thermosetting plastic. It becomes hard and rigid when heated and cannot be remolded.
- **Polythene (Polyethylene)**: This is a thermoplastic polymer. It can be melted and reshaped multiple times without any chemical change.

### Step 3: Conclusion
Based on the definitions and characteristics:
- Bakelite is an example of a thermosetting polymer.
- Polythene is an example of a thermoplastic polymer.

Thus, Bakelite and polythene are considered as examples of thermosetting and thermoplastic polymers, respectively.

### Final Answer
Bakelite and polythene are considered as examples of thermosetting and thermoplastic polymers.

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