Main ore of lead is gaalena.This is mined and separated from other minerals by froth flotation.There are two methods of extracting the lead. (i)First method involves the roasting of ore followed by reduction with coke or CO. (ii)Second method involves the partial roasting of ore followed by self reduction. In self reduction process, the species which bring about the reduction is :A. `O_2`B. `S^(2-)`C. `O^(2-)`D. `H_2S`

Main ore of lead is gaalena.This is mined and separated from other min

1.	Main ore of lead is gaalena.This is mined and separated from other minerals by froth flotation.There are two methods of extracting the lead. (i)First method involves the roasting of ore followed by reduction with coke or CO. (ii)Second method involves the partial roasting of ore followed by self reduction. In self reduction process, the species which bring about the reduction is :A. `O_2`B. `S^(2-)`C. `O^(2-)`D. `H_2S`
Answer» Correct Answer - B `Pboverset(2-)S + 2PbO underset("absence of air")overset(Delta)to3Pb(l)+overset(+4)(SO_2)uarr`

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