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It is said that electrolytic refining of...

It is said that electrolytic refining of copper is economic. Why?

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The correct Answer is:
Yes. This is due to the formation of anode sludge which consist of Au,Ag and PT
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Knowledge Check

  • During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are

    A
    Fe and Ni
    B
    Ag and Au
    C
    Pb and Zn
    D
    Se and Ag

  • During electrolytic refining of copper, some metals present as inpurity settle as 'anode mud'. These are -

    A
    Sn and Ag
    B
    Pb and Zn
    C
    Ag and A u
    D
    Fe and Ni

  • Copper is purified by electro-refining of blister copper. The correct statement(s) about this process is (are)

    A
    Impure copper strip is used as cathode
    B
    Acidified aqueous `CuSO_4` is used as electrolyte
    C
    Pure copper is deposited at cathode
    D
    Impurities settle as anode-mud

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    Explain the method of refining copper.

    a) Write the equation of the chemical reaction taking place at anode and cathode electrolytic refining of aluminium. b) Carbon monoxide cannot be used as reducing agent to extract aluminium from alumina. Why? c) Anode replaced from time to time while producing aluminium. Why?

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