MetallurgyHard
Question
Which of the following metals cannot be extracted by the carbon reduction process ?
Options
A.Zn
B.Fe
C.Al
D.Sn
Solution
Aluminium is extracted by electrolytic reduction of mixture of molten Al2O3 + Na3AlF6 + CaF2.
Due to very high energy of dissociation of Al2O3, the reduction at such high temperature will give carbide in place of metallic Al according to the following reaction. 2Al2O3 + 6C
Al4C3 + 3CO2.
Due to very high energy of dissociation of Al2O3, the reduction at such high temperature will give carbide in place of metallic Al according to the following reaction. 2Al2O3 + 6C
Al4C3 + 3CO2.Create a free account to view solution
View Solution FreeMore Metallurgy Questions
Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out :...Match the ores listed in column I with the type of ores listed in column II and select the correct. alternate. Column I ...Consider the following statements : S1 : Poling process is used for the refining of copper and lead. S2 : The scavenger ...In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:...Sulfide ores are common for the metals -...