Teflon, used as a non-stick coating in cooking utensils and in the electronic industry due to its insulating properties in wires etc., is a polymer involving carbon ________ bonding.
Fluoride
Teflon is the trade name of poly-tetrafluoroethylene (PTFE), made by polymerising the monomer tetrafluoroethylene $(CF_2=CF_2)$.
The resulting long chain has every carbon bonded to two fluorine atoms — i.e. a carbon–fluorine bonded polymer. The strong C–F bond makes it chemically inert, heat-resistant and gives the non-stick, insulating properties.
Hence, Fluoride.
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