The metals produced by various reduction processes are not very pure. They contain impurities, which must be removed to obtain pure metals. The most widely used method for refining impure metals is electrolytic refining. (i) What is the cathode and anode made of in the refining of copper by this process? 1 (ii) Name the solution used in the above process and write its formula. 1 (iii) (A) How copper gets refined when electric current is passed in the electrolytic cell? $\mathbf{2}$ 2
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