JEE Mains Model Paper 7

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Question : 40 of 90

Marks: +1, -0

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

Al3+ is reduced at the cathode to form Al
Na3AlF6 serves as the electrolyte
CO and CO2 are produced in this process
Al2O3 is mixed with CaF2 which lowers the melting point of the mixture and brings conductivity

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