Advertisements
Advertisements
प्रश्न
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Advertisements
उत्तर
At anode: \[\ce{2O^{2-} -> O2 + 4e-}\]
APPEARS IN
संबंधित प्रश्न
Define the Ore.
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
The metal which can be extracted from the bauxite ore is ______.
Give reasons, why aluminum is used in:
making alloys
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Define the following term.
Mineral
How are metals refined by the electrolytic methods?
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Which one of the following is not true of metal :
Metals are malleable and ductile
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
Mercury, silver, gold are highly reactive metals.
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain concept with example/explain with the help of a balanced equation.
Calcination
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Which of the statements about the reaction, \[\ce{ZnO + CO -> Zn + CO2}\] is correct?
In extraction of copper, the flux used is ____________.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
