Which of the following represents the final self-reduction step in the extraction of copper from cop

Question

Which of the following represents the final self-reduction step in the extraction of copper from copper pyrites?

Professor PC Thomas Classes · Answer

In the final auto-reduction step, the unreacted copper(I) sulphide acts as a reducing agent for copper(I) oxide to yield metallic 'blister' copper: $Cu_2S + 2Cu_2O \rightarrow 6Cu + SO_2$.