A) tetra chloroethylene
B) tetra bromoethylene
C) tetra iodoethylene
D) tetra fluoroethylene
Correct Answer: D
Solution :
Teflon is polytetrafluorine ethene (PTFE) is a -- polymer of tetrafluoro ethene \[(C{{F}_{2}}=C{{F}_{2}})\] \[\underset{\begin{smallmatrix} Tetrafluoro \\ ethylene \end{smallmatrix}}{\mathop{nC{{F}_{2}}=C{{F}_{2}}}}\,\xrightarrow[\Delta ,pressure]{{{(N{{H}_{4}})}_{2}}{{S}_{2}}{{O}_{8}}}\underset{Teflon}{\mathop{-{{[C{{F}_{2}}-C{{F}_{2}}]}_{n}}-}}\,\] It is used in coating utensils to make them non sticking, making seals, gaskets which can with- stand high pressure, insulations for high frequency electrical installations.
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