1.

Which of the following will best convert nitobenzene into 3-fluorobromobenzene .

Answer»

`F_(2)//AlCl_(3),Zn//HCl,NaNO_(2)//HCl-0^(@)C,CuBr` .<BR>`SnCl_(2)//HCl,Br//FeBr_(2),NaNO_(2)//HBF_(4)-0^(@)C,heat` .
`SnCl_(2)//HCl,NaNO_(2)//HBF_(4)-0^(@)C,heat,Br_(2)//FeBr_(3)` .
`Br_(2)//FeBr_(3)SnCl_(2)//HCl,NaNO_(2)//HBF_(4))^(@)C,heat`.

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