"Blister Copper" derives its name from the blistered appearance of its solidifying surface. This tex — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

The final auto-reduction step in the Bessemer converter is $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2 \uparrow$. As the molten 98% pure copper cools and solidifies, the dissolved Sulphur dioxide ($SO_2$) gas violently escapes, leaving blister-like craters on the metal surface.