List-I shows reactions involved in the metall | vedclass

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(B) The reactions are matched as follows:$(P). PbS + 2PbO \xrightarrow{\Delta} 3Pb + SO_2 \uparrow$ is an example of self-reduction (auto-reduction),w

Vedclass · Accepted Answer

$P-2, Q-4, R-3, S-1$

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(B) The reactions are matched as follows:$(P). PbS + 2PbO \xrightarrow{\Delta} 3Pb + SO_2 \uparrow$ is an example of self-reduction (auto-reduction),where the sulfide ore reacts with its oxide to produce the metal.$(Q). PbS + \frac{3}{2}O_2 \xrightarrow{\Delta} PbO + SO_2 \uparrow$ is roasting,where the sulfide ore is heated in the presence of excess air.$(R). PbCO_3 \xrightarrow{\Delta} PbO + CO_2 \uparrow$ is calcination,where the carbonate ore is heated in the absence of air.$(S). PbO + C \xrightarrow{\Delta} Pb + CO \uparrow$ is smelting,where the metal oxide is reduced using carbon as a reducing agent.Thus,the correct matching is $P-2, Q-4, R-3, S-1$.

List-$I$	List-$II$
$(P). PbS + 2PbO \xrightarrow{\Delta} 3Pb + SO_2 \uparrow$	$(1).$ Smelting
$(Q). PbS + \frac{3}{2}O_2 \xrightarrow{\Delta} PbO + SO_2 \uparrow$	$(2).$ Self reduction
$(R). PbCO_3 \xrightarrow{\Delta} PbO + CO_2 \uparrow$	$(3).$ Calcination
$(S). PbO + C \xrightarrow{\Delta} Pb + CO \uparrow$	$(4).$ Roasting

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