1.

The cell membranes are following statements is not true

Answer»

Buna-S is a copolymer of BUTADIENE and styrene
Natural rubber is a 1,4-polymer of ISOPRENE
In vulcanization, the FORMATION of sulphur bridges between different chains MAKE rubber harder and stronger
Natural rubber has the TRANS configuration at every double bond

Solution :Natural rubber has cis-configuration at each double bond. Gutta-Percha has trans-configuration at each double bond.


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