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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 three balanced equations for the purification of bauxite by Hall's process.
उत्तर
\[\ce{ Na3AlF6 ⇌ 3Na+ + Al3+ + 6F-}\]
\[\ce{CaF2 ⇌ Ca2+ + 2F-}\]
\[\ce{Al2O3 ⇌ 2Al3+ + 3O^{-}_{2}}\]
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संबंधित प्रश्न
For the substance given below, describe the role played in the extraction of aluminium.
Graphite
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 constituents of Brass.
For sodium hydroxide, explain its significance in the extraction of aluminium.
In the Hall's process for extraction of aluminium, Give the formula and purpose of fluorspar and 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.
In construction work, why is the alloy of aluminium, duralumin used rather than pure aluminium.
Answer the following question :
Name a metal which is found abundantly in earth's crust.
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 ______.
