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Which of the following is a thermosetting polymer?

1. Bakelite
2. Nylon 6
3. PVC
4. Buna-N

Correct answer: Bakelite

Solution

Bakelite is a thermosetting polymer because it undergoes a chemical change when heated, forming a rigid structure that cannot be remolded. This characteristic distinguishes it from thermoplastics, which can be reshaped upon heating.

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