Which of the following is not correctly matched with respect to the processes involved in the extractive metallurgy of the respective metal?

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A) Extraction of Al from its ore follows these steps:Leaching, precipitation, calcination and electrolytic reduction (molten state)Al2​O3​(s)+3H2​O(l)+2NaOH(aq)Leaching​2Na[Al(OH)4​](aq)2Na[Al(OH)4​](aq)+CO2​(g)→Al2​O3​.xH2​O(s)+2NaHCO3​(aq)Al2​O3​.xH2​O(s)1470KCalcination​Al2​O3​(s)+xH2​O(g)Electrolytic reduction of molten pure Al2​O3​ is mixed with Na2​AlF6​ or CaF2​This method is known as Hall-Heroult processCathode:Al3+(melt)+3e−→Al(l)Anode:C(s)+O2−(melt)→CO(g)+2e−C(s)+2O2−(melt)→CO2​(g)+4e−B) In case of Ag, extraction follows leaching and displacement method as:Leaching:Ag2​S+4NaCN⇌2Na[Ag(CN)2​]+Na2​SNa2​S+2O2​→Na2​SO4​Displacement by zinc in aqueous solution:2Na[Ag(CN)2​]+Zn→Na2​[Zn(CN)4​]+2Ag↓C) Extraction of Cu follows these as:Roasting:2PbS+3O2​Δ​2PbO+2SO2​Self reduction:2PbO+PbS→2Pb+SO2​D) Extraction of Mg follows:Calcination:MgCl2​.6H2​OΔ(calcination)Dry HCl(g)​MgCl2​+5H2​OIt is not made anhydrous by simple heating because it gets hydrolysedMgCl2​.6H2​OΔ​MgO.5H2​O+2HClElectrolytic reduction:Electrolytic reduction of molten anhydrous carnalite.MgCl2​⇌Mg2++2Cl−At cathode: Mg2++2e−→Mg (99% pure);At anode: 2Cl−→Cl2​+2e−Option D represents the incorrect statement.Ans-option D

Question Text	Which of the following is not correctly matched with respect to the processes involved in the extractive metallurgy of the respective metal?
Answer Type	Text solution:1
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Which of the following is not correctly matched with respect to the processes involved in the extractive metallurgy of the respective metal?

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