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Q.

The metal which is extracted by oxidation and subsequent reduction form its ore is:

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a

Ag

b

Fe

c

Cu

d

Al

answer is C.

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Detailed Solution

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In the extraction of Gold (Au) first oxidation of gold takes place and then it is reduced into gold

4Au(s)+8CN⁻(aq)+2H₂O(aq)+O₂(g)→4[Au(CN)₂]⁻(aq)+4OH⁻(aq)

2[Au(CN)₂]⁻(aq)+Zn(s)→2Au(s)+[Zn(CN)₄]²⁻(aq)

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The metal which is extracted by oxidation and subsequent reduction form its ore is: