Class 12 Chemistry Metallurgy General Principles and Processes of Isolation of Elements
Write short note on: Autoreduction
Solution: It is the process in which sulphide ores of less electropositive metals like Hg,Pb,Co etc. are heated in air so that a part of the ore is converted into oxide ore which in turns react with remaining suplhide ore in absence of air to give the metal and sulphur dioxide.