- Home
- Standard 12
- Chemistry
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