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प्रश्न
For the substance listed below, explain its role in the extraction of aluminium: Sodium hydroxide
उत्तर
Sodium hydroxide:
It reacts with alumina to form sodium aluminate which is
then further fiItered to separate impurities.
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संबंधित प्रश्न
Answer the following questions with respect to the electrolytic process in the extraction of aluminum:
Explain why powdered coke is sprinkled over the electrolytic mixture.
For bauxite, explain its significance in the extraction of aluminium.
In the Hall's process for extraction of aluminium, Give the formula and purpose of fluorspar and cryolite
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) Name the process used for purification of bauxite.
(ii) Write the equation to show the action of heat on aluminium hydroxide.
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Write an equation for the reaction which takes place at the anode during the extraction of aluminium by the electrolytic process.
Explain the reason:
Why 'food containing iron salts' should not be cooked in aluminium utensils?
Name the alloy used for the following purpose.
Aircraft
Name a metal which is found abundantly in the Earth's crust.
Write the constituents of the electrolyte for the extraction of aluminium.
The following sketch illustrates the process of conversion of Alumina to Aluminium:
- Name the constituent of the electrolyte mixture which has a divalent metal in it.
- Name the powdered substances ‘X’ sprinkled on the surface of the electrolyte mixture.
- What is the name of the process?
- Write the reactions taking place at the electrodes ‘Y’ (anode) and ‘Z’ (cathode), respectively.
