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(a) Make a flowchart to explain the various steps involved in the extraction of metals from ores.
(b) Give four characteristics of ionic compounds.
Give reasons only:
(a) Na, K and Li are stored under oil.
(b) Pt, Au and Ag are used to make jewellery.
(c) Hydrogen gas is not evolved when metals react with nitric acid.
(d) Aluminium is a reactive metal, yet it is used to make utensils for cooking.
(e) Aqueous copper sulphate solution should not be stored in an iron container.