Which of the following is a natural polymer?
- poly (Butadiene-styrene)
- polybutadiene
- poly (Butadiene-acrylonitrile)
- cis-1,4-polyisoprene
Answer
(4) cis-1,4-polyisoprene
Solution
As per NCERT, natural rubber is a linear polymer of isoprene (2-methyl-1,3-butadiene) and is also called cis-1,4-polyisoprene.
Poly (butadiene-styrene) (Buna-S), polybutadiene and poly (butadiene-acrylonitrile) (Buna-N) are synthetic polymers.
Answer: (4)