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What is teflon ? How is it prepared ?...

What is teflon ? How is it prepared ? 

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Teflon is polytetrafluoro ethylene. It is prepared by the action of chloroform with antimony trifluoride and hydrofluoric acid, followed by vinyl polymerisation.
`CHCl_(3) underset(HF)overset(SbF_(3))rarr CHF_(2)Cl underset(-HCl)overset(800^(@)C)rarr CF_(2)=CF_(2)`
`nCF_(2)= CF_(2) rarr [-CF_(2)-CF_(2)-]_(n)`
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AAKASH SERIES-ALKYL AND ARYL HALIDES-Problem
  1. Predict the major product obtained by dehydrochlorination of

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  2. Why the chlorine atom in vinyl chloride is nonreactive?

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  3. Allyl iodide can be obtained from allyl chloride. Explain.

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  4. Write the structures of major and minor products formed when 3-chloro-...

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  5. Arrange each set of compounds in order of increasing boiling points ...

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  6. Draw the structures of major products in each of the following reactio...

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  7. 2-Bromo-2, 3-dimethylbutane is treated with alcoholic potash. Write th...

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  8. In the following pairs of halogen compounds which would undergo S(N^(2...

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  9. Chloroform is treated with aqueous silver nitrate. What happens?

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  10. How do you distinguish between CH(3)CH=CHCl, CH(3)CH(2)CH(2)Cl and CH(...

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  11. How iodoform is distinguished from chloroform?

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  12. How will you distinguish between chloroform and carbon tetrachloride ?

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  13. What is teflon ? How is it prepared ?

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  14. What are freons? How are they prepared?

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  15. Among the three isomeric dichlorobenzenes , which has the highest...

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  16. Benzyl chloride undergoes nucleophilic substitution much more easily t...

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  17. Which product will form when optically active form of C4 H9 Br is subj...

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  18. Nucleophilic substitution in aryl halides is facilitated by electron w...

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  19. Identify A, B, C, D, E, R and R' in the following R-Br + Mg overs...

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  20. What happends when iodobenzene is heated with copper powder at 200^(@)...

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