Answer :

(i) Teflon is prepared by the polymerization of Tetrafluoroethene(PTFE) molecules. It is done so by heating PTFE molecules under high pressure and in presence of ammonium peroxo sulphate [(

(ii) Buna-N is obtained by the copolymerization of 1,3-butadiene and acrylonitrile in presence of a peroxide catalyst.

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