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Question 41 of 46

Q.Non-stick cookwares generally have a coating of a polymer, whose monomer is :

(a) chloroethene
(b) ethane
(c) 1,1,2,2-tetrafluoroethane
(d) prop-2-enenitrile
Puducherry TnboardTamil Nadu HSC (DGE) Board 2025MCQ· 1mImportance★★★★★
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Non-stick cookware is coated with Teflon (polytetrafluoroethylene, PTFE), the addition polymer formed from the monomer tetrafluoroethene (CF2=CF2CF_2=CF_2), polymerised under high pressure with a peroxide catalyst.

Polytetrafluoroethylene (PTFE, trade name Teflon) is prepared by the free-radical addition polymerisation of tetrafluoroethene (also called 1,1,2,2-tetrafluoroethylene), CF2=CF2CF_2=CF_2, using a peroxide catalyst at high pressure: n CF2=CF2→peroxide catalyst, high pressure(−CF2−CF2−)nn\,CF_2=CF_2 \xrightarrow{\text{peroxide catalyst, high pressure}} (-CF_2-CF_2-)_n The resulting polymer is chemically inert, extremely resistant to heat and corrosive chemicals, and has a very low coefficient of friction — which is exactly why it is used as the non-stick coating on cookware. Chloroethene (vinyl chloride, option a) is the monomer o …

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