Write short note on:<br/>Autoreduction

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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

H g, P b, C o

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.

Example:

C u_{2} S + O_{2} \to C u O + S O_{2}

C u_{2} S + C u O \to C u + S O_{2}

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