Question

In the given flow chart I, II, III and IV are___________

• A. Electrolysis, Concentration, Roasting, Calcination
• B. Concentration, Electrolysis, Calcination, Roasting
• C. Calcination,Concentration, Electrolysis, Roasting
• D. Concentration, Electrolysis, Roasting, Calcination

Answer 1

Answer: (B)

Concentration, Electrolysis, Calcination, Roasting

In the given chart of metallurgical extraction at step I ore is concentrated to remove the impurities. In step II metal of high reactivity undergo electrolysis or electrorefining like sodium or potassium metals are highly reactive. In step III calcination of carbonate ore is done in the absence of air while in step IV roasting of sulfide ore is done in the presence of air.