Description : The basic chemical building block of natural rubber obtained from trees is – (1) Isoprene (2) Vinyl Chloride (3) Acetylene (4) Neoprene
Last Answer : (1) Isoprene Explanation: Isoprene was first isolated by thermal decomposition of natural rubber. About 95% of isoprene production is used to produce cis-1,4- polyisoprene---a synthetic version of natural ... consists mainly of poly-cis-isoprene with a molecular weight of 100,000 to 1,000,000.