Question

Which of the following ores is (are) roasted to produce metals?

Options

• Bauxite

• Copper pyrites

• Iron pyrites

• Horn silver

Answer 1

Copper pyrites, Iron pyrites

Explanation:

Roasting is the process of heating sulphide ores in the presence of air to convert them into oxides before reduction. Both copper pyrites (CuFeS₂) and iron pyrites (FeS₂) are sulphide ores, hence they are roasted to produce their respective oxides. Bauxite (Al₂O₃ . 2H₂O) and horn silver (AgCl) are not sulphide ores, so they are not roasted.