Which of the following is used as the cathode in electrolytic refining of zinc?

Aluminium

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Pure zinc

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Impure zinc

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both pure and impure zinc

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Solution

The correct option is A
Aluminium

In electrolytic refining of zinc, the electrolyte used is acidified zinc sulphate $Z n S O_{4} + d i l . H_{2} S O_{4}$ in which zinc can get dissolved. To avoid that aluminium is used as the cathode instead of pure zinc as cathode in electrolytic refining of zinc.

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Q. During electrolytic refining of zinc, pure zinc gets:

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How is impure zinc finally electro-refined?

Q. Assertion :van Arkel method is used for refining of zinc. Reason: In this method impure metal is evaporated to obtain the pure metal as distillate.

Q. During electrolytic refining of copper.
(a) Pure copper acts as anode.
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In general, electrolytic refining is a process of purification of impure metal during which an electric current is passed through an electrolytic cell which contains impure metal as anode, a suitable electrolyte and pure metal as cathode.

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Which of the following is used as the cathode in electrolytic refining of zinc?

The correct option is A Aluminium In electrolytic refining of zinc, the electrolyte used is acidified zinc sulphate ZnSO4+dil.H2SO4 in which zinc can get dissolved. To avoid that aluminium is used as the cathode instead of pure zinc as cathode in electrolytic refining of zinc.