In which of the following reactions conc...

In which of the following reactions conc. `H_(2)SO_(4)` is used as an oxidising reagent?

A

`CaF_2+H_2SO_4 rarr CaSO_4+2HF`

B

`2HI+H_2SO_4 rarr I_2+SO_2+2H_2O`

C

`Cu+2H_2SO_4 rarr CuSO_4+SO_2+H_2O`

D

`NaCl+H_2SO_4 ra NaHSO_4+HCl`

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The correct Answer is:

B, C

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