Q81 / 180 · NEET 2020 (Phase 1) · Chemistry

Which of the following is a natural polymer?

  • A
    poly (Butadiene-styrene)
  • B
    polybutadiene
  • C
    poly (Butadiene-acrylonitrile)
  • Correct answer
    D
    cis-1, 4-polyisoprene

Solution

Natural rubber is a polymer of isoprene. The chemical name of isoprene is 2-methyl-1,3-butadiene and its chemical formula is CH2=C(CH3)−CH=CH2. Isoprene is a liquid that is colourless and volatile. As we can see from the formula it has two double bonds.
So answer is cis-1,4-polyisoprene

Hence, the correct answer is option: 'D'.

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