Which of the following reactions is common fo | vedclass

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(A) In the extraction of lead $(Pb)$ from galena $(PbS)$,the ore is first roasted to form lead oxide $(PbO)$: $2PbS + 3O_2 	o 2PbO + 2SO_2$. Self-red

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$PbS + \frac{3}{2} O_2 	o PbO + SO_2$

Vedclass · Answer

(A) In the extraction of lead $(Pb)$ from galena $(PbS)$,the ore is first roasted to form lead oxide $(PbO)$: $2PbS + 3O_2 	o 2PbO + 2SO_2$. Self-reduction occurs when the remaining $PbS$ reacts with the formed $PbO$: $PbS + 2PbO 	o 3Pb + SO_2$. Carbon reduction involves the reduction of $PbO$ using carbon or carbon monoxide: $PbO + C 	o Pb + CO$ or $PbO + CO 	o Pb + CO_2$. However,the roasting reaction $(PbS + \frac{3}{2} O_2 	o PbO + SO_2)$ is the essential preliminary step that provides the $PbO$ required for both subsequent reduction processes.

Which of the following reactions is common for both self-reduction and carbon reduction when $Pb$ is extracted from galena $(PbS)$?

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In the light of the above statements,choose the most appropriate answer from the options given below :

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