Question

A short note on auto reduction

Answer 1

Answer:

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.

Explanation:

Answer 2

Explanation:

This process is also called auto reduction process or air reduction process. The sulphide ores of less electro positive metals like Hg, Pb, Cu etc., are heated in air as to convert part of the ore into oxide or sulphate which then reacts with the remaining sulphide ore to give the metal and sulphur dioxide.