Q.Non stick cook wares generally have a coating of a polymer, whose monomer is

Non-stick cookware is coated with Teflon (polytetrafluoroethylene, PTFE), the addition polymer formed from the monomer tetrafluoroethene ($CF_2=CF_2$), 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), $CF_2=CF_2$, using a peroxide catalyst at high pressure: $n\,CF_2=CF_2 \xrightarrow{\text{peroxide catalyst, high pressure}} (-CF_2-CF_2-)_n$ 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 …

Each repeat unit, $-CH_2-CH(CH_3)-$, comes from addition polymerisation of propene.

The given repeat unit, $\left(-CH_2-CH(CH_3)-CH_2-CH(CH_3)-\right)_n$, is built from a two-carbon backbone unit carrying a methyl branch — exactly the pattern obtained by addition-polymerising propene ($CH_2=CH-CH_3$), where the double bond opens up to link successive units head-to-tail: …