1.

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

Answer»

`CaF_(2) + H_(2)SO_(4) rarr CaSO_(4) + 2HF`
`2 HI + H_(2)SO_(4) rarr I_(2) SO_(2) + 2H_(2)O`
`Cu + 2H_(2)SO_(4) rarr CuSO_(4) + SO_(2) + 2H_(2)O`
`NaCl + H_(2)SO_(4) rarr NaHSO_(4) + HCL`

Solution :`2overset(-1)(HI)+H_(2)overset(+6)(SO)_(2) rarr overset(0)(I_(2))+overset(+4)(SO)_(2)+H_(2)O","overset(0)(Cu) + 2H_(2)overset(+6)(SO)_(4) rarr CuSO_(4)+ overset(+4)(SO)_(2)+2H_(2)O`
In these two REACTIONS, `H_(2)SO_(4)` acts as an oxidising agent.


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