Which one of the following polymers is prepared by addition polymerisation?

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Teflon (polytetrafluoroethylene) is prepared by the addition polymerisation of tetrafluoroethylene ( $C F_{2} = C F_{2}$ ) under high pressure in the presence of a free radical catalyst.

Nylon-6,6 is a condensation polymer formed from hexamethylenediamine and adipic acid.

Novolac is a condensation polymer formed from phenol and formaldehyde.

Dacron (polyethylene terephthalate) is a condensation polymer formed from ethylene glycol and terephthalic acid.

Answer: Teflon

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