Refining Of Metals

Reduction of Ores and Refining of Metal

What is meant by refining of metals? Name the most widely used method of refining impure metals produced by various reduction processes. Describe with the help of a labelled diagram how this method may be used for refining of copper.

Match the following processes of metallurgy with their corresponding ore for which they are used : (i) Froth floatation method (a) Germanium (ii) Electrolytic refining of metals (b) ZnS (iii) Zone refining of metals (c) copper

Mark the correct statements. (i) Mercury can be refined by the process of distillation. (ii) In poling, the molten impure metal is stirred with green poles of wood. (iii) In electrolytic refining of metals , impure metal is made as cathode and a thin strip of pure metal is made as anode.

Which of the following is not employed for refining of metal ?

Explain the principla of the method electrolytic refining of metal .Given one example