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प्रश्न
What is the role of cryolite in the extraction of aluminium?
उत्तर
The function of the cryolite is to lower the fusion temperature from 2050°C to 950°C and to enhance conductivity.
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संबंधित प्रश्न
What is the role of coke in the extraction of iron from its oxides?
Which of the ores mentioned can be concentrated by magnetic separation method?
Differentiate between “minerals” and “ores”.
Which among the following minerals does NOT contain aluminium?
(a) Cryolite
(b) Siderite
(c) China clay
(d) Corundum
Explain the following methods to protect metals from corrosion:
Galvanization
Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
Which of the following reactions occur during calcination?
(i) \[\ce{CaCo3 -> CaO + CO2}\]
(ii) \[\ce{2FeS2 + 11/2 O2 -> Fe2O3 + 4SO2}\]
(iii) \[\ce{Al2O3. {x}H2O -> Al2O3 + {x}H2O}\]
(iv) \[\ce{ZnS + 3/2 O2 -> ZnO + SO2}\]
Metal always found in Free State is
Pyrolusite is ______.
The ore that contains both iron and copper is ______.
