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| List-$I$ | List-$II$ |
| $(P) \ PbS + 2PbO \xrightarrow{\Delta} 3Pb + SO_2 \uparrow$ | $(1) \ \text{प्रगलन (Smelting)}$ |
| $(Q) \ PbS + \frac{3}{2}O_2 \xrightarrow{\Delta} PbO + SO_2 \uparrow$ | $(2) \ \text{स्वतः अपचयन (Self reduction)}$ |
| $(R) \ PbCO_3 \xrightarrow{\Delta} PbO + CO_2 \uparrow$ | $(3) \ \text{निस्तापन (Calcination)}$ |
| $(S) \ PbO + C \xrightarrow{\Delta} Pb + CO \uparrow$ | $(4) \ \text{भर्जन (Roasting)}$ |
| List-$I$ | List-$II$ |
|---|---|
| $A$. सोने के अयस्क का सांद्रण | $I$. एनिलीन |
| $B$. एल्यूमिना का निक्षालन (Leaching) | $II$. $NaOH$ |
| $C$. झाग स्थायीकारक (Froth stabiliser) | $III$. $SO_2$ |
| $D$. फफोलेदार तांबा (Blister copper) | $IV$. $NaCN$ |
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