Advertisements
Advertisements
प्रश्न
what is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?
Advertisements
उत्तर
Cryolite is used in the electrolysis of alumina. The function of cryolite is to
(i) Reduce melting point of alumina
(ii) Make molten alumina a good conductor of electricity.
APPEARS IN
संबंधित प्रश्न
Name a non-metallic element which forms acidic and neutral oxides
Name a non-metallic element which has a metallic lustre
Write balanced equation for the following reaction:
Reduction of iron (III) oxide by carbon monoxide.
Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.
If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?
What metallic property is shown by the non-metal graphite?
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) The iron (III) oxide?
Answer the following question :
Name the process used for the enrichment of sulphide ore.
Complete the following by selecting the correct option from the choices given :
The diavalent metal whose oxide is reduced to metal by electrolysis of its fused salt is ________
Give the equations for the reduction of copper oxide.
