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| Q. |
The basic chemical building block of natural rubber obtained from trees is – |
| A. | Isoprene |
| B. | Vinyl Chloride |
| C. | Acetylene |
| D. | Neoprene |
| Answer» A. Isoprene | |
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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 rubber. Natural rubber consists mainly of poly-cis-isoprene with a molecular weight of 100,000 to 1,000,000. |
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