On heating `NaX` with `H_(2)SO_(4)` and `MnO_(2)` the halogen that cannot be prepared is
On heating `NaX` with `H_(2)SO_(4)` and `MnO_(2)` the halogen that cannot be prepared is
A. `I_(2)`
B. `F_2`
C. `Cl_(2)`
D. `Br_(2)`
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Correct Answer - B
`2NaX+H_(2)SO_(4) overset(Delta)to Na_(2)SO_(4_)+2HX`
`MnO_(2)+4HX to MaX_(2)+X_(2)(g)+2H_(2)O`
`MnO_(2)` can oxidize HCl, and HI and not HF. Hence `F_(2)` cannot be greated by this method.
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