Given below are two statements, one is Assertion and other is Reason. Assertion : Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties. Reason : The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure. In the light of the above statements, choose the correct one from the options given below

Step-by-step solution

Natural rubber Natural rubber is a polymer of isoprene, and obtained from natural source-latex tree. In natural rubber, isoprene units are joined together in head-to-tail fashion and all double bonds in the polymer chain have cis configurations as shown in the given figure. The polymer contains cis repeating units and has a molecular weight ranging from 100 , 000 upto 1 , 000 , 000 The cis arrangement of the double bonds in natural rubber prevents the rubber molecules from fitting into an ordered structure. Thus, r