Which of the following reduction are actually employed in commercial e – InterviewSolution

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1.	Which of the following reduction are actually employed in commercial extraction of metals?
Answer» `Fe_(2)O_(3) + 2Al to Al_(2)O_(3) + 2Fe` `Cr_(2)O_(3) + 2Al to Al_(2)O_(3) + 2Cr` `2Na[Au(CN)_(2)] + Znto Na_(2)[ZN(CN)_(4)]+ 2Au` `Cu_(2)S + Pb to Cu + PbS DARR` Answer :B::C

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