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प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
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उत्तर
In the electrolytic reduction of alumina, the reaction at the cathode is as follows:
Al3+ + 3e- → Al
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संबंधित प्रश्न
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
The process by which sulphide ore is concentrated.
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Define the term mineral.
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- Name the metal X.
- Name the metal oxide XO2.
- Which reducing agent can be used to reduce XO2 to obtain metal X?
- Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
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Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Define the term:
Slag
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Define calcination.
Zinc sulphide : Roasting : : zinc carbonate : _______
Complete flow chart given below.

