16. a) How will you show experimentally that metals are good conductors of heat. 5
b) Describe the extraction of Mercury metal from its ore Cinnabar (HgS).
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a) Metals when heated gets red hot but does not melt showing that metals are good conductors of heat.
b) When Cinnabar is heated in air, it first changes into its oxide, HgO and then reduced into Mercury metal on further heating.
b) When Cinnabar is heated in air, it first changes into its oxide, HgO and then reduced into Mercury metal on further heating.
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