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# For which of the following metals, hydrometal lagrical exceractive method may be emploved

$(a)\;\text{Copper} \\(b)\;\text{iron} \\(c)\;\text{chromium} \\ (d)\;\text{tin}$
Can you answer this question?

Copper is the corrcet answer.
Hence a is the correct answer.
answered Mar 17, 2014 by