During the roasting of specific ores, various volatile impurities are removed. Which of the followin — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

During roasting in an excess of air, non-metal and metalloid impurities such as Phosphorus ($P_4O_{10}$), Arsenic ($As_2O_3$), Antimony ($Sb_2O_3$), and Sulphur ($SO_2$) are converted into volatile oxides and removed. Silicon remains as non-volatile $SiO_2$ and is typically removed as slag ($CaSiO_3$ or $FeSiO_3$).