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Natural Rubber is a Polymer of

  • A.Butadiene
  • B.Chloroprene
  • C.Ethylene
  • D.Isoprene

Answer: D

Natural rubber is a polymer of isoprene.

It is cis-1,4-polyisoprene, and the all-cis geometry is what gives it elasticity, since the chains cannot pack neatly. Gutta-percha is the trans isomer of the same polymer and is hard and inelastic.

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