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प्रश्न
Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium
उत्तर
Electrolytic cell for the extraction of aluminium:
संबंधित प्रश्न
Write the reactions involved in the zone of reduction in blast furnace during extraction of iron.
Silica is added to roasted copper ore during smelting process to remove _______.
(A) ferrous sulphide
(B) ferrous oxide
(C) cuprous sulphide
(D) cuprous oxide
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
Purification of aluminium by electrolytic refining is carried out by
(a)Hoope process
(b)Hall process
(c)Baeyer process
(d)Serperck process
What is the role of cryolite in the extraction of aluminium?
What is the role of limestone in the extraction of iron from its oxides?
In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?
What is the role of coke in the extraction of iron from its oxides?
Indicate the principle behind the method used for the refining of zinc.
Which form of the iron is the purest form of commercial iron?
Differentiate between “minerals” and “ores”.
Define Leaching.
Write the names and chemical formulae of any ‘two’ minerals of aluminium.
What is the role of the following compound-
SiO2 in the extraction of copper from copper pyrites?
Copper has the face centred cubic structure. The coordination number of each ion is:
How will you convert the following:
[Ag(CN)2]− to Ag
Which among the following statement is correct?
The most abundant metal on earth is:
The sulphide ore of iron is ____________.
Carbonate ore of iron is ____________.
In the extraction of aluminium by Hall-Heroult process, purified \[\ce{Al2O3}\] is mixed with \[\ce{CaF2}\] to:
(i) lower the melting point of \[\ce{Al2O3}\].
(ii) increase the conductivity of molten mixture.
(iii) reduce \[\ce{Al^{3+}}\] into \[\ce{Al(s)}\].
(iv) acts as catalyst.
In the thermite process, the reducing agent is:
Extraction of zinc from zinc blende is achieved by:-
Metal always found in Free State is
Native silver metal forms a water solution complex with dilute solution of Na CN in the presence of
