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प्रश्न
A compound that is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
उत्तर
Cryolite
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संबंधित प्रश्न
Give the importance of the following for living beings:
Hydrogen
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their: hydroxide
Name the processes involved in refining of ores.
Explain the following terms:
(a) flux
Explain the following term:
Gangue
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 three balanced equations for the purification of bauxite.
Name the following:
Name an allotrope of a non-metal that allows electricity to pass through it.
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal K-1 mol-1).
