You are required to match all the metallurgical extractions given in column-I with the processes given in column-II. {:("Column-I","Column-II"),("(Metallurgical extraction)","(Process involved in metallurgical extraction)"),((A)Al_2O_3. 2H_2OtoAl,(p)"Leaching"),((B)KCl.MgCl_2. 6H_2O,(q)"self reduction"),((C )Ag_2S to Ag,(r)"Electrolytic reduction(molten state)"),((D)PbStoPb,(s)"Roasting"),(,(t)"Displacement method"):}

You are required to match all the metallurgical extractions given in c

1.	You are required to match all the metallurgical extractions given in column-I with the processes given in column-II. {:("Column-I","Column-II"),("(Metallurgical extraction)","(Process involved in metallurgical extraction)"),((A)Al_2O_3. 2H_2OtoAl,(p)"Leaching"),((B)KCl.MgCl_2. 6H_2O,(q)"self reduction"),((C )Ag_2S to Ag,(r)"Electrolytic reduction(molten state)"),((D)PbStoPb,(s)"Roasting"),(,(t)"Displacement method"):}
Answer» Solution :(A)`Al_2O_3(s)+3H_2O(l)+2NAOH(aq)to2Na[Al(OH)_4](aq)` `2Na[Al(OH)_4](aq)+CO_2(g)toAl_2O_3 xH_2O(s)+2NaHCO_3`(aq) `Al_2O_3 xH_2O(s)overset(1470K)toAl_2O_3(s)+xH_2O(g)` ELECTROLYTIC reduction of molten pure `Al_2O_3` mixed with `Na_3AIF_6 or CaF_2` Method is known as Hall-Heroult PROCESS Cathode: `Al^(3+)('melt")+3e^(-)toA(l)` Anode: `C(s)+O^(2-)("melt")toCO(g) +2e^(-)` `C(s)+2O^(2-)("melt")toCO_2(g) +4e^(-)` (B)Electroytic reduction of molten anhydrous carnalite. `MgCl_2 hArr 2Na[Ag(CN)_2]+Na_2S` `{:("At cathode",Mg^(2+)+2e^(-)toMg(99% pure)),("At anode" , 2Cl^(-)toCl_2+2e^(-)):}` ( C)`Ag_2S+4NaCN hArr 2Na[Ag(CN)_2]+Na_2S` `Na_2S+2O_2 to Na_2SO_4` `2Na[Ag(CN)_2]+Zn to Na_2[Zn(CN)_4]+2Ag darr` (D)`2PbS+3O_2oversetDeltato2PbO +2SO_2` `2PbO+PbSto 3Pb+SO_2`