JEE Main · 2005 · 08 May 2005 · Offline · Polymers

Which of the following is fully fluorinated polymer?

(A)Neoprene
(B)Teflon✓ Correct
(C)Thiokol
(D)PVC

Answer: (B)

Solution

A fully fluorinated polymer is one in which fluorine has replaced every hydrogen on the carbon backbone. Teflon, polytetrafluoroethylene, is built from

- (CF X_{2} - CF X_{2}) X^{-}

units in which all the positions on each carbon pair are fluorine, with no hydrogen left at all. Neoprene is chlorine-based, Thiokol is a polysulphide and PVC keeps most of its hydrogens, so Teflon is the fully fluorinated one.

JEE Main · 2005 · 08 May 2005 · Offline · Single correct option

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