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प्रश्न
Explain with reason:
Carbon can reduce lead oxide but not aluminium oxide.
उत्तर
Aluminium has a great affinity for oxygen and cannot be reduced by carbon, carbon monoxide, or hydrogen, whereas lead oxide can be easily reduced to metal lead by carbon.
\[\ce{PbO + C -> Pb + CO}\]
\[\ce{PbO + CO -> Pb + CO2}\]
Moreover, aluminium combines with C to form \[\ce{[Al4C3]}\].
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संबंधित प्रश्न
Answer the following questions with respect to the electrolytic process in the extraction of aluminum:
Identify the components of the electrolyte other than pure alumina and the role played by each
Name the following: A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminum
Both brass and bronze contain copper as major constituents. Name other elements in these alloys.
For bauxite, explain its significance in the extraction of aluminium.
Name the ore from which aluminium is extracted.
An aqueous solution of sodium chloride is not used for electrolytic reduction of sodium metal. Why?
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Write three balanced equations for the purification of bauxite by Hall's process.
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Mention one reason for the use of aluminium in thermite welding. Which particular property of cast iron makes it unsuitable for the construction of bridges?
Describe the role played in the extraction of aluminum:
Sodium hydroxide
Explain why :
In the electrolysis of alumina using the Hall Heroult's Process the electrolyte is covered with powdered coke.
