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प्रश्न
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Write an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process.
उत्तर
O2- - 2e- → [O]
[O] + [O] → O2
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संबंधित प्रश्न
Why is food containing iron salts should not be cooked in aluminium utensils?
An aqueous solution of sodium chloride is not used for electrolytic reduction of sodium metal. Why?
For the substance listed below, explain its role in the extraction of aluminium: Sodium hydroxide
For the substance listed below, explain its role in the extraction of aluminium: Cryolite
In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(i) Name the process used for purification of bauxite.
(ii) Write the equation to show the action of heat on aluminium hydroxide.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction that takes place at the cathode
The following question relate to the extraction of aluminium by electrolysis.
Explain why is it necessary to renew the anode periodically.
Name the following :
A compound added to lower the fusion temperature of electrolytic bath in the extracton of aluminium.
Name the alloy used for the following purpose.
Making electric circuits
The compound that is not a constituent of the electrolytic mixture used in Hall-Heroult's process is ______.
