Q.
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a
The copper ore is leached with bacteria or by using sulphuric acid
b
Hydrometallurgical process is echo friendly because the sulphur content of the ore is oxidized to sulphate instead of liberating pollutant SO2 gas
c
From the solution copper is recovered by using more electropositive metal line zinc or scrap iron
d
In hydrometallurgical process copper is obtained by the electrolytic reduction
answer is A.
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