1.

The best method to prepare fluoroethane is

Answer»

`C_(2)H_(5)OH overset(HF//H_(2)SO_(4))rarr`
`C_(2)H_(5)OH overset(HF//SbF_(5))rarr`
`C_(2)H_(5)Cl overset(Hg_(2) F_(2)//Delta)rarr`
`C_(2)H_(6) overset(F_(2)//h upsilon) rarr`

SOLUTION :Fluoro derivatives of alkanes can be obtained by halogen exchange method using inorganic fluorides such as `SbF_(3), AGF, Hg_(2)F_(2)` , etc.
`2C_(2)H_(5)Cl+Hg_(2)F_(2) rarr 2C_(2)H_(5)F+Hg_(2)Cl_(2)`


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