1.

Which reaction cannot be used for the preparation of halogen acid

Answer»

`CaF_(2) +H_(2) SO_(4"(conc)") +rarr CaSO_(4) + HF `
` NaHSO_(4) + NACL rarr Na_(2) SO_(4) + HCl`
` NaCl + H_(2) SO_("4(conc)") rarr NaHSO_(4) + HCl`
`2KBr +H_(2) SO_("4(conc)") rarr K_(2) SO_(4) + 2HBR`

Solution :`2KBr + H_(2) SO_(4"(conc)")rarr K_(2) SO_(4) + 2HBr`


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