Explain the terms giving suitable example-Roasting, Calcination, Refining, Electrolysis, Zone refining.Write answer in details of the given question.
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Roasting is a pyrochemical process in which the ore is heated in the presence of oxygen or air is below its melting point. ... roasting is done in reverberatory furnace. Ex:-2ZnS+3O2 ----> 2ZnO+SO2.
Calcination is also a pyrochemical process in which ore is heated in the absence of air.the is decomposed in this process.
refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.
electrolysis is
chemical decomposition produced by passing an electric current through a liquid or solution containing ions.
zone refining is a method of purifying a crystalline solid, typically a semiconductor or metal, by causing a narrow molten zone to travel slowly along an otherwise solid rod or bar to one end, at which impurities become concentrated.
Calcination is also a pyrochemical process in which ore is heated in the absence of air.the is decomposed in this process.
refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.
electrolysis is
chemical decomposition produced by passing an electric current through a liquid or solution containing ions.
zone refining is a method of purifying a crystalline solid, typically a semiconductor or metal, by causing a narrow molten zone to travel slowly along an otherwise solid rod or bar to one end, at which impurities become concentrated.
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