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प्रश्न
What is the role of limestone in the extraction of iron from its oxides?
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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)
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संबंधित प्रश्न
What is the chemical composition of malachite?
- CuO . CuC03
- Cu(OH)2 CuC03
- CuO.Cu(OH)2
- Cu2O . Cu(OH)2
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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?
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Galvanization
Explain the following methods to protect metals from corrosion:
Passivation
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Although carbon and hydrogen are better reducing agents but they are not used to reduce metallic oxides at high temperatures. Why?
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In the electrolytic process for the extraction of aluminium the electrolyte is:-
Calamine and Malachite, respectively, are the ores of ______.
