Question

Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.

How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.

With the help of suitable chemical equations, list the two main differences between roasting and calcination. How is metal reduced from the product obtained after roasting/calcination of the ore ? Write the chemical equation for the reaction involved.

Select the correct statements. I. Oxide ores of heavy metals are concentrated by hydraulic washing. II. Froth floatation process is used for the concentration of magnetic ores. III. Oxides of highly reactive metals can be reduced to metals by the action of heat alone. IV. Carbonate ores are decomposed to form metal oxides by heating in the absence of air.