Question

Which of the following ores undergoes roasting?

• A. Carbonate ores
• B. Oxide ores
• C. Sulphide ores
• D. All of these

Answer 1

The Correct Option is C

Roasting is a process where ores are heated in the presence of oxygen, usually to remove sulfur or other impurities. Among the given options:
Carbonate ores usually undergo calcination, which involves heating the ore in the absence of air to decompose it and remove carbon dioxide.
Oxide ores are often reduced by heating in the presence of a reducing agent.
Sulphide ores undergo roasting, where they are heated in the presence of oxygen to convert them into oxides, releasing sulfur dioxide gas.

The correct option is (C): Sulphide ores