1.

Copper sulphate is prepared by blowing a current of air through copper scrap and dilute H_(2)SO_(4). Dilute HNO_(3) is also added:

Answer»

to oxidize copper to `Cu^(2+)` which then form `CuSO_(4)` with DILUTE `H_(2)SO_(4)`
to oxidise `Fe^(2+)` to ion (III) sulphate, which remains in solution after crystallisation of `CuSO_(4)`
to speed up the ionisation of `H_(2)SO_(4)` to give `SO_(4)^(2-)` ions
Which COMBINES with `H_(2)SO_(4)` to give a very STRONG oxidising mixture and oxidise Cu to `Cu^(2+)`

Answer :A


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