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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
Name the solution used to react with Bauxite as a first step in obtaining pure aluminum oxide, in the Baeyer’s process
Write the equation for the reaction that occurs at the cathode during the extraction of aluminum by electrolysis.
Explain the following:
In construction work, why is the alloy of aluminium-duralumin used rather than pure aluminium?
Name the following:
The substance added along with aluminium in the Hall-Heroult's process.
In the Hall's process for extraction of aluminium, Sate the location of cathode and anode and explain what occurs at each electrode.
Correct the following statement :
Haematite is the chief ore of aluminium.
Answer the following question :
Name a metal which is found abundantly in earth's crust.
Describe the role played in the extraction of aluminum:
Sodium hydroxide
Name the alloy used for the following purpose.
Surgical instruments
Write the balanced chemical equation to show the concentration of ore in Baeyer’s process.
Sodium aluminate to aluminium hydroxide
