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STATEMENT-1: Glycogen is a biopolymer. ...

STATEMENT-1: Glycogen is a biopolymer.
STATEMENT-2:Chloroprene is polymer of isoprene.
STATEMENT-3 : Buna-S is natural rubber.

A

TTT

B

FFF

C

TFT

D

TFF

Text Solution

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The correct Answer is:
D
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Assertion (A) For making rubber synthetically isoprene molecules are polymerised . reason (R ) Neoprene (a polymer of chloroprene) is a syntheitc rubber

Buna-S rubber is the polymer of which type ?

Rubber is a naturally occurring polymer, which is a linear polymer of isoprene. It can be easily deformed but regains its original shape after the stress is relieved. The properties of natural rubber can be modified and improved by process of vulcanization. It is mixed with 3 to 5% sulphur and heated at 373-423 K. This forms cross links through disulphide bonds (-S-S-) , which make rubber hard, tough with greater tensile strength. There are many different formulations of synthetic rubbers. These are copolymers in which one of the monomer is isoprene. Some common examples are neoprene rubber, Buna-S, Buna-N, etc. Does natural rubber has cis- or trans-configuration about the double bonds?

STATEMENT-1-: Vulcanization introduces S-S crosslinking in rubber and STATEMENT-2 Vulcanized rubber has low water absorption tendency.

Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene .During the treatement this isoprene forms a high molecular wiehg polymer of isoprene. Natural rubber can be obtained from five hundred different species of plants. In the isoprene polymer all the isoprene have

Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene .During the treatement this isoprene forms a high molecular wiehg polymer of isoprene. Natural rubber can be obtained from five hundred different species of plants. Which rubber is not polydiene ?