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Question

Which of the following reactions are used for the preparation of the halogen acid?


A

2KBr+H2SO4conc.K2SO4+2HBr

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B

CaF2+H2SO4conc.CaSO4+2HF

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C

NaCl+H2SO4conc.NaHSO4+HCl

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D

2KI+H2SO4conc.K2SO4+2HI

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Solution

The correct option is C

NaCl+H2SO4conc.NaHSO4+HCl


For synthesizing HCl:

NaCl+H2SO4conc.NaHSO4+HCl

And for preparing HF,

CaF2+H2SO4conc.CaSO4+2HF


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