1.

Which reaction cannot be used for the production of halogen acid

Answer»

`2KBr + H_(2)SO_(4)to K_2SO_(4) +2HBr`
`NaHSO_(4) + NACL to Na_(2)SO_(4) + HCL`
`NaCl + H_(2)SO_(4) to NaHSO_4 + HCl `
`CaF_(2) + H_(2)SO_(4) to NaSO_(4) + 2HF`

Solution :`2KBr +H_(2)SO_(4) to K_(2)SO_(4) +2HBr`


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