| List-$I$ | List-$II$ |
|---|---|
| $(a)$ Sodium Carbonate | $(i)$ Deacon |
| $(b)$ Titanium | $(ii)$ Castner-Kellner |
| $(c)$ Chlorine | $(iii)$ Van-Arkel |
| $(d)$ Sodium hydroxide | $(iv)$ Solvay |
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| List-$I$ | List-$II$ |
| $I.$ Cyanide process | $(1)$ Ultrapure $Ge$ |
| $II.$ Floatation process | $(2)$ Dressing of $HgS$ |
| $III.$ Electrolytic reduction | $(3)$ Extraction of $Al$ |
| $IV.$ Zone refining | $(4)$ Extraction of $Au$ |
| Column-$I$ | Column-$II$ |
| $A$. $PbS \rightarrow PbO$ | $p$. roasting |
| $B$. $CaCO_3 \rightarrow CaO$ | $q$. calcination |
| $C$. $ZnS \rightarrow Zn$ | $r$. Carbon reduction |
| $D$. $Cu_2S \rightarrow Cu$ | $s$. self reduction |
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