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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.
Name a chemicals used for dissolving aluminium oxide. In which state of sub-division is the chemical used?
उत्तर
Fluorspar and cryolite act as solvent. The percentage by weight composition is as follows:
Alumina - 20% by mass
Cryolite - 60% by mass
Fluorspar - 20% by mass
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संबंधित प्रश्न
Write the equation for the reaction that occurs at the cathode during the extraction of aluminum by electrolysis.
For cryolite, explain its significance in the extraction of aluminium.
In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes 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 (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
- Name the process used for the purification of bauxite.
- Write the equation for the action of heat on aluminium hydroxide.
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.
Give reason for the following:
Extraction of aluminium was very difficult in the beginning.
The following question relate to the extraction of aluminium by electrolysis.
Name the other aluminium containing compound added to alumina and state the significance.
In Hoope's process, pure aluminium is collected at the ______ of the electrolytic cell.
Name the alloy used for the following purpose.
Aircraft
Write the constituents of the electrolyte for the extraction of aluminium.
The chief ore of Aluminium is ______
