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(A) Electrolytic refining is a process used to purify metals that are obtained from their ores.Metals like copper $(Cu)$,gold $(Au)$,silver $(Ag)$,and

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$(i)$ and $(ii)$

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(A) Electrolytic refining is a process used to purify metals that are obtained from their ores.Metals like copper $(Cu)$,gold $(Au)$,silver $(Ag)$,and zinc $(Zn)$ are commonly refined using the electrolytic refining method.In this process,an impure metal is made the anode,and a pure strip of the same metal is made the cathode.Metals like sodium $(Na)$ and potassium $(K)$ are highly reactive and are extracted by the electrolytic reduction of their molten chlorides,not by electrolytic refining of the metal itself.Therefore,$(i)$ $Au$ and $(ii)$ $Cu$ are the metals refined by electrolytic refining.

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
$(i)$ $Au$
$(ii)$ $Cu$
$(iii)$ $Na$
$(iv)$ $K$

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Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?$(i)$ $Au$$(ii)$ $Cu$$(iii)$ $Na$$(iv)$ $K$