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General Principles And Processes of Isolation Of Elements
Question
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In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?

  • CO and CO2 are produced in this process

  • Al2O3 is mixed with CaF2 which lowers the melting point of the mixture and brings conductivity

  • Al3+ is reduced at the cathode to form Al

  • Na3AlF6 serves as the electrolyte

Answer

D.

Na3AlF6 serves as the electrolyte

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