1.

Which step is not involved in hydrometallurgical process ?

Answer»

`Cu_(2)S + 2Cu_(2)O rarr 6 CU + SO_(2)`
`CuSO_(4) + Fe rarr Cu + FeSO_(4)`
`CuFeS_(2)+2H_(2)SO_(4) rarr CuSO_(4) + FeSO_(4) + H_(2)S`
`CuCO_(3) + H_(2)SO_(4) rarr CuSO_(4) + CO_(2) + H_(2)O`

Answer :A


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