Question:

What type of polymer the natural rubber is?

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Natural rubber is a polymer with weak forces between chains that can stretch, so it is an elastomer.
Updated On: Oct 1, 2026
  • Fibre
  • Elastomer
  • Thermoplastic
  • Thermosetting plastic
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The Correct Option is B

Solution and Explanation

Step 1: Understanding the Concept:
Polymers are grouped by the strength of forces between their chains. This gives elastomers, fibres, thermoplastics and thermosetting plastics.

Step 2: Detailed Explanation:
Natural rubber is cis-1,4-polyisoprene. Its chains are held by weak van der Waals forces and are coiled, so it stretches and then returns to its shape. Polymers that behave like this are elastomers.

Step 3: Why the other options are wrong.
Fibres have strong hydrogen bonds or dipole forces (nylon). Thermoplastics soften on heating (polythene). Thermosetting plastics harden on heating (bakelite).

Final Answer:
Natural rubber is an elastomer, option (B). \[ \boxed{\text{Elastomer}} \]
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