Advertisements
Advertisements
Questions
Explain with reason:
In the electrolytic reduction of alumina, the graphite anode is gradually consumed.
Explain with reason:
Why the anode has to be replaced from time to time in this process?
Advertisements
Solution
In the electrolytic reduction of alumina, the graphite (anode) is oxidised by oxygen to CO and further forms CO2, so it is consumed and has to be replaced from time to time.
\[\ce{2C + O2 -> 2CO}\]
\[\ce{2CO + O2 -> 2CO2}\]
APPEARS IN
RELATED QUESTIONS
Name the following:
A metal oxide that can be reduced by hydrogen.
How is the following metallic oxide reduced? Write the equation:
Zinc oxide
Give equation for the following conversion: Ferric oxide to iron.
Name oxide of one metal which is reduced by (give equation): Electrolytic reduction
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
Name a non-metallic element which is a conductor of electricity.
With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]
Answer the following question with respect by hydrogen : Identify the components of the electrolyte other than pure alumina and the role played by each.
Complete the following by selecting the correct option from the choices given :
The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ________
Write a balanced equation for the reduction of copper (ll) oxide by hydrogen.
