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JEE Main2015ChemistryGeneral Principles and Processes of Isolation of MetalsActual

In the context of the Hall-Heroult process for the extraction of Al , which of the following statements is false?

Options

  1. AN a 3 A l F 6 serves as the electrolyte.
  2. BC O and C O 2 are produced in this process.
  3. CA l 2 O 3 is mixed with C a F 2 which lowers the melting point of the mixture and brings conductivity.
  4. DA l 3 + is reduced at the cathode to form Al .

Correct answer

A. N a 3 A l F 6 serves as the electrolyte.

Step-by-step solution

Hall - Heroult process for extraction of Al. Al 2 O 3 is electrolyte Na 3 AlF 6 reduces the fusion temperature & provides good conductivity.

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