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Question

Which one of the following figures correctly describes the process of electrolytic refining?


A

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B

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C

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D

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Solution

The correct option is C


Explanation for correct option

(C)

Electrolytic refining

  • Electrolytic refining is the use of electricity to refine impure metals.
  • The anode in this process is impure metal, and the cathode is a strip of pure metal.
  • The electrolyte is a solution of a soluble salt of the same metal.
  • Copper may be refined in this process.

Copper metal refining

  • In the electrolytic refining of copper, copper sulfate is used as the cathode, while impure copper is employed as the anode.
  • The anode, a pure metal sheet of copper, is where oxidation occurs.
  • Copper ions are formed when electrons are lost at the anode and gained at the cathode.
  • As a result, copper metal is refined.

Explanation for incorrect options

  • The figures correctly describes the process of electrolytic refining is (C).
  • Hence all other options (A), (D) and (D) are incorrect.

Therefore, the correct option is (C).


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