In the aluminothermic process, the role of Al is as a/an _____.
Reducing agent
Reducing agent is correct.
In the aluminothermic (thermite) process, powdered aluminium is ignited with a metal oxide, for example Fe2O3 + 2Al → 2Fe + Al2O3.
Aluminium has a very high affinity for oxygen, so it removes oxygen from the oxide and is itself oxidised to Al2O3; the metal oxide is reduced to the free metal.
A substance that takes oxygen away (gives electrons) acts as a reducing agent. The reaction is strongly exothermic and is used to weld railway tracks and to extract metals such as chromium and manganese. Al does not oxidise, sulfurize or hydrogenate here.
Important Questions from General Principles And Process of Isolation of Elements
Electrolysis as a source of extraction of metals are only successful when ________________.
Which of the following statements are true for the reaction of Fe2O3 with aluminium?
1. It is known as the ‘thermite reaction’.
2. The heat evolved is used for welding purpose.
3. Aluminium metal acts as an oxidizing agent.
4. Molten Fe and Al are formed at the end of the reaction.
Select the correct answer using the code given below.
The metal refined by Van Arkel method is
Froth floatation process is based on-
- Which of the following metals is NOT refined by electrolytic refining?
