Name a common metal which is highly resistant to corrosion.

59 Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved. 59 Explain why, the galvanized iron article is protected against rusting even if the zinc layer is broken. 60 Name the metal which is extracted from the ore called 'rock salt'. 60 Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.