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प्रश्न
The compound that is not a constituent of the electrolytic mixture used in Hall-Heroult's process is ______.
पर्याय
\[\ce{Al2O3}\]
\[\ce{NaAlO2}\]
\[\ce{Na3AlF6}\]
\[\ce{CaF2}\]
उत्तर
The compound that is not a constituent of the electrolytic mixture used in Hall-Heroult's process is \[\underline{\ce{NaAlO2}}\].
Explanation:
Aluminum from aluminum oxide is extracted using the Hall-Heroult technique (alumina, \[\ce{Al2O3}\]). In order to lower the melting point of alumina and increase the conductivity of the solution, an electrolytic mixture made primarily of molten alumina, a mixture of cryolite \[\ce{(Na3AlF6}\]), and additional fluxes such as calcium fluoride (\[\ce{CaF2}\]) is employed in this process.
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संबंधित प्रश्न
For the substance given below, describe the role played in the extraction of aluminium.
Graphite
Explain why In the electrolysis of alumina using the Hall Heroult's Process the electrolyte is covered with powdered coke
Name the following: A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminum
Name three alloys of steel. Give their compositions and uses.
Name the following:
The materials used as electrodes in the electrolytic extraction of aluminium.
Give reason for the following:
Nitric acid can be stored in aluminium containers.
The following question relate to the extraction of aluminium by electrolysis.
Explain why is it necessary to renew the anode periodically.
Explain why :
In the electrolysis of alumina using the Hall Heroult's Process the electrolyte is covered with powdered coke.
Explain why it is preferably to use a number of graphite electrodes as anode instead of a single electrode, during the above electrolysis.
Fused alumina is reduced to aluminium by electrolytic reduction, since ______.
