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

Engineering

Chemistry

Electrolytic Refining

Extraction of Gold Silver Aluminium

Question

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

A

Na₃AlF₆ serves as the electrolyte

B

Al³⁺ is reduced at the cathode to form Al

C

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

D

CO and CO₂ are produced in this process

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(B) In Hall Heroult process alumina (Al₂O₃) is used as electrolyte.

Cryolite (Na₃AlF₆) and Fluospar (CaF₂) are used to lowers the melting point of the mixture and brings conductivity