In Bayers' process, the soluble material present in the gangue is .
Important Questions on General Principles and Processes of Isolation of Elements
Alumina is mixed with Cryolite and subjected to electrolysis to extract aluminium.
Write the equation of the reduction reaction taking place at negative electrode.
Name the gas evolved in the following case:
Alumina undergoes electrolytic reduction.
Alumina is mixed with Cryolite and subjected to electrolysis to extract aluminium.
Why Cryolite is added to alumina?
Write the equation for the formation of aluminium at the cathode during the electrolysis of alumina.
Different methods are used for the concentration of ores.
Explain how the ore of aluminium is concentrated by leaching.
Match the following
| List - I | List - II | ||
| (a) | Copper | (i) | Bauxite |
| (b) | Iron | (ii) | Malachite |
| (c) | Zinc | (iii) | Haematite |
| (d) | Aluminium | (iv) | Calamine |
| (v) | Galena |
The correct answer is
Answer the following question based on the extraction of aluminium from alumina by Hall-Heroult’s Process.
Why is powdered coke sprinkled on top of the electrolyte?
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of with cryolite.
Reason (R) : The oxidation state of in cryolite is
In the light of the above statements, choose the most appropriate answer from the options given below :
Alumina is mixed with Cryolite and subjected to electrolysis to extract aluminium.
Which are the ions present in the alumina?
Answer the following question based on the extraction of aluminium from alumina by Hall-Heroult’s Process.
Name the electrode, from which aluminium is collected.
Answer the following question based on the extraction of aluminium from alumina by Hall-Heroult’s Process.
What is the function of cryolite used along with alumina as the electrolyte?
