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प्रश्न
What is the role of cryolite (NaAlF6) in the electrolytic reduction of alumina in the Hall's process?
उत्तर
Cryolite acts as a solvent for the electrolytic mixture in the electrolytic reduction of alumina in the Hall's process.
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संबंधित प्रश्न
Name the constituents of Duralumin.
Name the constituents of Solder.
For bauxite, explain its significance in the extraction of aluminium.
Give reason for the following:
Extraction of aluminium was very difficult in the beginning.
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.
In construction work, why is the alloy of aluminium, duralumin used rather than pure aluminium.
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?
Write the equation for the reaction where the aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide.
During the concentration of bauxite ore, aluminium goes in ______ part because of its ______ nature.
Name the alloy used for the following purpose.
Making electric circuits
Name the alloy used for the following purpose.
Surgical instruments
