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प्रश्न
Describe the role played in the extraction of aluminum : Graphite
उत्तर
Graphite: Thick rods of graphite are suspended in the fused electrolyte. They act as an anode where oxygen gas is discharged.
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संबंधित प्रश्न
For sodium hydroxide, explain its significance in the extraction of aluminium.
For cryolite, explain its significance in the extraction of aluminium.
The reason for using Aluminium in the alloy duralumin is ______.
Give reason for the following:
Extraction of aluminium was very difficult in the beginning.
Explain and give reasons why aluminium vessels should not be cleaned with powders containing alkalis.
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.
(i) Name the process used for purification of bauxite.
(ii) Write the equation to show the action of heat on aluminium hydroxide.
Explain why :
Iron sheets are coated with zinc during galvanization.
Name the alloy used for the following purpose.
Making medals
What impurities are present in aluminium ore?
Given below in column A is a schematic diagram of the electrolytic reduction of alumina. Identify the parts labelled as A, B and C with the correct options from the Column B.
| column A | column B | |
 |
1. | Platinum |
| 2. | Anode | |
| 3. | Cathode | |
| 4. | Electrolyte mixture | |
| 5. | Bauxite |
