JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pl149
Select all the correct statements about natural rubber.
AVulcanised rubber is thermoplastic and can be melted and remoulded
BVulcanisation with sulfur introduces cross-links between chains
CIt is cis-1,4-polyisoprene
DGutta-percha is the cis isomer of the same polymer
Answer: B, C
Natural rubber is the all-cis polymer of isoprene and gutta-percha is the trans form. Sulfur cross-links form a network on vulcanisation, so vulcanised rubber does not melt and remould.