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Which is known as 'blister copper' ?

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Important Questions on Metallurgy

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Cast iron is used for the manufacture of :
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In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
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The purest form of commercial iron is:
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In the context of the Hall-Heroult process for the extraction of Al, which of the following statement is incorrect.
HARD
Which series of reactions correctly represents the chemical relations related to iron and its compound?
MEDIUM
Identify the correct statement from the following:
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Among the reactions a-d, the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are:
a CaO+SiO2CaSiO3
b 3Fe2O3+CO2Fe3O4+CO2
c FeO+SiO2FeSiO3
d FeOFe+12O2
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Match the following 

   List - I     List - II
(a) Copper (i) Bauxite
(b) Iron (ii) Malachite
(c) Zinc (iii) Haematite
(d) Aluminium (iv) Calamine
    (v) Galena

The correct answer is

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Name the process that is employed to refine aluminium.
MEDIUM
The form of iron obtained from blast furnace is :
MEDIUM
The final step for extraction of copper from copper pyrite in bessemer converter involves the reaction
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In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:
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The molecular formula of malachite ore is:
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Among statements (a) – (d), the correct ones are :
(a) Lime stone is decomposed to CaO during the extraction of iron from its oxides.
(b) In the extraction of silver, silver is extracted as an anionic complex.
(c) Nickel is purified by Mond’s process.
(d) Zr and Ti are purified by Van Arkel method.
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Copper is extracted from copper pyrites by
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Which among following processes occurs at 1500 K in blast furnace for extraction of iron 
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What happens during bessemerization process of extraction of copper from copper pyrites?
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Extraction of copper by smelting uses silica as an additive to remove.
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In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:
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Hall Heroult's process is given by: