Advertisements
Advertisements
प्रश्न
What is the role of limestone in the extraction of iron from its oxides?
Advertisements
उत्तर
Limestone decomposes to form CaO which reacts with silicate impurity in the blast furnace to form slag.
CaCO3 → CaO + CO2
CaO + SiO2 → CaSiO3 (slag)
APPEARS IN
संबंधित प्रश्न
What is the chemical composition of malachite?
- CuO . CuC03
- Cu(OH)2 CuC03
- CuO.Cu(OH)2
- Cu2O . Cu(OH)2
Mention names and formulae of two ores of alumunium.
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
Define Leaching.
Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
What is the role of the following compound-
SiO2 in the extraction of copper from copper pyrites?
In the extraction of zinc from zinc blende:
(i) Give an equation to show how zinc oxide is converted to zinc.
(ii) How is impure zinc finally electro-refined?
Give the uses of zinc.
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.
Metal always found in Free State is
