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प्रश्न
For the substance listed below, explain its role in the extraction of aluminium: Graphite
उत्तर
Graphite: It acts as electrodes in the electrolytic extraction of aluminium.
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संबंधित प्रश्न
For the substance given below, describe the role played in the extraction of aluminium.
Cryolite
For the substance given below, describe the role played in the extraction of aluminium.
Graphite
Give the chemical names and formulae of the main ores of zinc.
Explain with reason:
Carbon can reduce lead oxide but not aluminium oxide.
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?
Why is food containing iron salts should not be cooked in aluminium utensils?
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.
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.
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.
In Hoope's process, pure aluminium is collected at the ______ of the electrolytic cell.
