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Which reaction cannot be ussed for the p...

Which reaction cannot be ussed for the preparation of the halogen acid

A

`2KBr + H_2SO_4 (conc.)rarr K_2SO_4 + 2HBr`

B

`NaCl + H_2SO_4 (conc.) rarr NaHSO_4 + HCl`

C

`NaHSO_4 + NaCl rarr Na_2SO_4 + HCl`

D

`CaF_2 + H_2SO_4 (conc.)rarr CaSO_4 + 2HF`

Text Solution

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The correct Answer is:
A
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