1.

Which of the following reaction regarding the preparation of hydrogen halide is not correct ?

Answer»

`CaF_(2)+H_(2)SO_(4) underset("Conc")to CaSO_(4)+2HF`
`NaCl+H_(2)SO_(4) underset("conc")to NaHSO_(4)+HCl`
`NaBr+underset("conc")(H_(2)SO_(4)) to NaHSO_(4)+HBR`
`PI_(3)+3H_(2)O to H_(3)PO_(3)+3HI`

Solution :SULPHURIC acid oxidises `HBr or HI` to `Br_(2) or I_(2)` the halides HBr and HI can be prepared by the hydrolysis of phosphorous tri halides with cold water
`PX_(3)+3H_(2)O to H_(3) O_(3)+3HX`
`X=Br or I`


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