General Principles and processes of Isolation of Elements
hard

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

A

$Al^{^{3+}}$ is reduced at the cathode to form $Al$

B

$Na_3AlF_6$ serves as the electrolyte

C

$CO$ and $CO_2$ are produced in this process

D

$Al_2O_3$ is mixed with $CaF_2$ which lowers the melting point of the mixture and brings conductivity

(JEE MAIN-2015)

Solution

In the metallurgy of aluminum purified $A l_{2} O_{3}$ is mixed with $N a_{3} A l F_{6}$ or $C a F_{2}$ which lowers the meting point of the mix and brings conductivity.

Standard 12
Chemistry

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