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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
Explain why In the electrolysis of alumina using the Hall Heroult's Process the electrolyte is covered with powdered coke
Aluminium is a more active metal than iron, but suffers less corrosion. Why?
Name the constituents of Brass.
For sodium hydroxide, explain its significance in the extraction of aluminium.
Name the following:
The substance added along with aluminium in the Hall-Heroult's process.
The following is an extract from 'Metals in the Service of Man, Alexander and Street/Pelican 1976':
| 'Alumina (aluminium oxide) has a very high melting point of over 2000°C so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance.' |
- Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide?
- The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the balanced chemical equation for this reaction.
- Name the element which serves both as the anode and the cathode in the extraction of aluminium.
- Write the balanced chemical equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
- Give the balanced chemical equation for the reaction which occurs at the anode when aluminium is purified by electrolysis.
Answer the following question :
Name a metal which is found abundantly in earth's crust.
Describe the role played in the extraction of aluminum : Graphite
Name the solution used to react with bauxite as a first step in obtaining pure aluminium oxide, in the Baeyer's process.
Name the compound added to pure alumina to lower the fusion temperature during the electrolytic reduction of alumina.
