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Question: Answered & Verified by Expert
In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
ChemistryGeneral Principles and Processes of Isolation of MetalsJEE MainJEE Main 2015 (04 Apr)
Options:
  • A Na3AlF6 serves as the electrolyte.
  • B CO and CO2 are produced in this process.
  • C Al2O3 is mixed with CaF2 which lowers the melting point of the mixture and brings conductivity.
  • D Al3+ is reduced at the cathode to form Al.
Solution:
1035 Upvotes Verified Answer
The correct answer is: Na3AlF6 serves as the electrolyte.
Hall - Heroult process for extraction of Al. Al2O3 is electrolyte Na3AlF6 reduces the fusion temperature & provides good conductivity.

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