Give the principle of Electromagnetic separation.

Name the methods by which concentrated ore is converted to metallic oxide.

State three objectives achieved during the roasting of ores.

Name the processes involved in dressing of the ores.

Name the processes involved in refining of ores.

Name two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.

Why does iron or zinc not occur free in nature?

What do you observe when hydrogen is passed over heated copper oxide?