Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.

59 Name a common metal which is highly resistant to corrosion. 60 Name the metal which is extracted from the ore called 'rock salt'. 60 Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved. 60 In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte?