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प्रश्न
Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.
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उत्तर
Carbon anodes are used in the electrolytic extraction of aluminium because carbon in the form of graphite is a good conductor of electricity.
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संबंधित प्रश्न
Name the following:
A metal oxide that can be reduced by hydrogen.
Give equation for the following conversion: Aluminium hydroxide to aluminium oxide.
Give equation for the following conversion: Aluminium to aluminium nitride.
Name oxide of one metal which is reduced by (give equation): Reduction with heat alone
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.]
What metallic property is shown by the non-metal graphite?
Give the equations for the reduction of Lead (II) oxide.
The following sketch represents the electroplating of an Iron cup with Nickel metal.
Study the diagram and answer the following questions:
- During electroplating, the iron cup is placed at the cathode. Why?
- Name the ion that must be present in the electrolyte.
- State one condition that is necessary to ensure that the deposit is smooth, firm and even.
- Write the reaction taking place at the cathode.
- What change would you observe at the anode?
