Advertisements
Advertisements
प्रश्न
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 an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process.
उत्तर
At anode:
\[\ce{6O^{2-} - 12e^- -> 6[O]}\]
\[\ce{3[O] + 3[O] -> 3O2}\]
Anode is oxidised to carbon monoxide, which further forms carbon dioxide.
\[\ce{2C + O2 -> 2CO}\]
\[\ce{2CO + O2 -> 2CO2}\]
APPEARS IN
संबंधित प्रश्न
For the substance given below, describe the role played in the extraction of aluminium.
Cryolite
Explain the following:
In construction work, why is the alloy of aluminium-duralumin used rather than pure aluminium?
How is ore purified (give equations also)
For the substance listed below, explain its role in the extraction of aluminium: Graphite
A to F below relate to the source and extraction of either zinc or aluminium.
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
Fill in the blanks using the most appropriate words from A to F:
(i) The ore from which aluminium is extracted must be treated with ______ so that pure aluminium oxide can be obtained.
(ii) Pure aluminium oxide is dissolved in ______ to make a conducting solution.
Name the following:
The middle region of the blast furnace.
The following question relate to the extraction of aluminium by electrolysis.
Name the other aluminium containing compound added to alumina and state the significance.
The following question relate to the extraction of aluminium by electrolysis.
Explain why is it necessary to renew the anode periodically.
Name the following :
A compound added to lower the fusion temperature of electrolytic bath in the extracton of aluminium.
Write the balanced chemical equation to show the concentration of ore in Baeyer’s process.
Sodium aluminate to aluminium hydroxide
