Advertisements
Advertisements
Question
Name the following:
The substance added along with aluminium in the Hall-Heroult's process.
Solution
Cryolite, aluminium fluoride, Calcium fluoride.
APPEARS IN
RELATED QUESTIONS
Aluminium is said to be more reactive than iron, towards oxygen (or air) yet iron undergoes corrosion to a greater extent than aluminum. Explain.
Aluminium is a more active metal than iron, but suffers less corrosion. Why?
Explain the following:
In construction work, why is the alloy of aluminium-duralumin used rather than pure aluminium?
How is aluminium obtained from pure ore?
For the substance listed below, explain its role in the extraction of aluminium: Cryolite
The sketch below illustrates the refin ing of aluminium by Hoope's process
(a) Which of A and B is th e cathode and which one is the anode?
(b) What is the electroly te in the tank?
( c) What material is used for th e cathode?
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction that takes place at the cathode
Name the following :
A compound added to lower the fusion temperature of electrolytic bath in the extracton of aluminium.
Name the compound added to pure alumina to lower the fusion temperature during the electrolytic reduction of alumina.
Given below in column A is a schematic diagram of the electrolytic reduction of alumina. Identify the parts labelled as A, B and C with the correct options from the Column B.
| column A | column B | |
 |
1. | Platinum |
| 2. | Anode | |
| 3. | Cathode | |
| 4. | Electrolyte mixture | |
| 5. | Bauxite |
