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Which of the following reduction reactio...

Which of the following reduction reactions are actually employed in commercial extraction of metals ?

A

`Fe_(2)O_(3) + 2Al to Al_(2)O_(3) + 2Fe`

B

`Cr_(2)O_(3) + 2Al to Al_(2)O_(3) + 2Cr`

C

`2Na[Au(CN)_(2)] + Zn to Na_(2)[Zn(CN)_(4)]+ 2Au`

D

`Cu_(2)S + Pb to Cu + PbS darr`

Text Solution

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The correct Answer is:
B, C
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