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प्रश्न
The following question relate to the extraction of aluminium by electrolysis.
Explain why is it necessary to renew the anode periodically.
उत्तर
Extraction of aluminium:
It is necessary to renew the anode periodically as it gets oxidised by the oxygen evolved at the anode.
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संबंधित प्रश्न
Answer the following questions with respect to the electrolytic process in the extraction of aluminum:
Explain why powdered coke is sprinkled over the electrolytic mixture.
Aluminium is said to be more reactive than iron, towards oxygen (or air) yet iron undergoes corrosion to a greater extent than aluminum. Explain.
Aluminium is a more active metal than iron, but suffers less corrosion. Why?
Name the constituents of Duralumin.
For sodium hydroxide, explain its significance in the extraction of aluminium.
Explain the following:
In construction work, why is the alloy of aluminium-duralumin used rather than pure aluminium?
For the substance listed below, explain its role in the extraction of aluminium: Cryolite
The following question relate to the extraction of aluminium by electrolysis.
Name the other aluminium containing compound added to alumina and state the significance.
Explain the reason:
Why 'food containing iron salts' should not be cooked in aluminium utensils?
Name the alloy used for the following purpose.
Surgical instruments
