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प्रश्न
Name the following:
The substance added along with aluminium in the Hall-Heroult's process.
उत्तर
Cryolite, aluminium fluoride, Calcium fluoride.
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संबंधित प्रश्न
Write the equation for the reaction where the aluminum oxide for the electrolytic extraction of aluminum is obtained by heating aluminum hydroxide.
For graphite, explain its significance in the extraction of aluminium.
Give reason for the following:
Nitric acid can be stored in aluminium containers.
Name the solution used to react with bauxite as a first step in obtaining pure aluminium oxide, in the Baeyer's process.
Name the alloy used for the following purpose.
Surgical instruments
Name a metal which is found abundantly in the Earth's crust.
Answer the following question:
Write the chemical formula of one main ore of iron and aluminium.
State the relevant reason for the following:
A layer of powered coke is used over the electrolytic mixture in Hall Heroult’s process.
State the relevant reason for the following:
Graphite anodes are continuously replaced during the electrolysis of alumina.
The following sketch illustrates the process of conversion of Alumina to Aluminium:
- Name the constituent of the electrolyte mixture which has a divalent metal in it.
- Name the powdered substances ‘X’ sprinkled on the surface of the electrolyte mixture.
- What is the name of the process?
- Write the reactions taking place at the electrodes ‘Y’ (anode) and ‘Z’ (cathode), respectively.
