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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
Answer the following questions with respect to the electrolytic process in the extraction of aluminum:
Identify the components of the electrolyte other than pure alumina and the role played by each
For the substance given below, describe the role played in the extraction of aluminium.
Sodium hydroxide
Name the process by which the refining of aluminium is done ?
Name the constituents of Bronze.
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.
When bauxite is treated with sodium hydroxide solution, what happens to:
- the aluminium oxide,
- the iron (III) oxide?
The reason for using Aluminium in the alloy duralumin is ______.
Name the following:
The chief ore of aluminium.
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
A to F below relate to the source and extraction of either zinc or aluminium.
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
Fill in the blanks using the most appropriate words from A to F:
(i) The ore from which aluminium is extracted must be treated with ______ so that pure aluminium oxide can be obtained.
(ii) Pure aluminium oxide is dissolved in ______ to make a conducting solution.
