Q.

Auto reduction process is used in the extraction of

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a

Cu and Hg

b

Zn and Hg

c

Cu and Mg

d

Fe and Pb

answer is A.

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Detailed Solution

Auto reduction takes place in the case of Cu and Hg.The reactions are as follows:2HgS+3O2→2HgO+2SO22HgO+HgS→3Hg+SO22Cu2S+3O2→2Cu2O+2SO22Cu2O+Cu2S→6Cu+SO2
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Auto reduction process is used in the extraction of