MetallurgyMedium
Question
Which one of the following metals cannot be extracted by carbon reduction ?
Options
A.Pb
B.Fe
C.Zn
D.Al
Solution
Electrolytic reduction method is used in the extraction of highly electropositive elements as they themselves are stronger reducing agents. They lie above hydrogen in electrochemical series. The heat of formation of Al2O3 is very high and therefore, at higher temperature there will be the possibility of formation of Al4C3 with carbon.
Create a free account to view solution
View Solution FreeMore Metallurgy Questions
The rocky and silicious matter associated with an ore is called :...During the electrolysis of fused carnallite, MgCl2 is decomposed to liberate Mg at cathode and not KCl to liberate the K...In the extraction of copper from its sulphide ore the metal is formed by the reduction of Cu2O with:...Which of the following ores is(are) concentrated by froth floatation?...NaCN is sometimes added in the froth flotation process as a depressant when ZnS and PbS minerals are expected because :...