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Question

While analyzing a piece of plastic, Nicky observed that it softened on heating and hardened on cooling. She was also able to mould it into different shapes after heating. Which amongst the following might be that material?
  1. PVC
  2. Terylene
  3. Bakelite
  4. Melamine


Solution

The correct option is A PVC
Plastics that get deformed easily on heating and can be remoulded are known as thermoplastics. Thermoplastics softens on heating and hardens on cooling. Polyvinyl chloride (PVC) is the best example of thermoplastic.

Bakelite and melamine are examples of thermosetting plastics, which cannot be softened by heating once its moulded. Hence, bakelite and melamine cannot be remoulded into other shapes.

Terylene is a polyester and not a plastic.

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