Answers

2016-01-17T15:00:14+05:30
Metals like gold or silver are very unreactive but the oxides of these metal can be reduced to metal by heating alone the sulphide ores of such metals are heated in the presence of suffecient amount of oxygen ie these ores are roasted and then the oxide ore of the metal is heated in the presence of limited supply of oxygen
NOW this metal undergoes refining process through which all impurities in them are removed. Metals like gold are refined electrolytically.
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2016-01-17T20:55:29+05:30
Precious metals gold, silver, platinum
, palladiumgold, silver, platinum, palladium, titanium, assay, hallmark,Maker Mends Ltd provider for the jewellery and watch industry. … gold nugget. Gold can be alloyed with other metals and comes in many colours. … It is non reactive to air and water.Native metal
Only  gold, silver, copper and the platinum metals occur in nature in larger … the less reactive metals such as gold and platinum are found as native metals. … since the process of extracting metals from their ores, smelting, is thought to …. of the iron-nickel alloys: taenite (high nickel content) and kamacite (low nickel content).


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