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प्रश्न
Name the compound added to pure alumina to lower the fusion temperature during the electrolytic reduction of alumina.
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उत्तर
Cryolite
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संबंधित प्रश्न
How is the following metallic oxide reduced? Write equations:
Iron (ll) oxide
Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.
Give equation for the following conversion:Aluminium to sodium aluminate.
Name oxide of one metal which is reduced by (give equation): Electrolytic reduction
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.]
Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.
What is the type of bonding expected in a metallic chloride?
In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence.
"By dissolving aluminium oxide in cryolite, a ______ (conducting / non- conducting) solution is produced.
(iii) Why so much graphite required for this electrolytic process.
(iv) Write the equation for the reaction which takes place at cathode.
Answer the following question with respect by hydrogen :
Explain why powdered coke is sprinkled over than electrolytic mixture.
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 ________
