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प्रश्न
What is the role of cryolite in the extraction of aluminium?
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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
Silica is added to roasted copper ore during smelting process to remove _______.
(A) ferrous sulphide
(B) ferrous oxide
(C) cuprous sulphide
(D) cuprous oxide
Write chemical formulae of the following ores :
(a) Calamine
(b) Haematite
(c) Magnetite
(d) Corundum
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(i) Give an equation to show how zinc oxide is converted to zinc.
(ii) How is impure zinc finally electro-refined?
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| List - I | List - II | ||
| a. | Siderite | I. | FeCO3 |
| b. | Malachite | II. | CuCO3 · Cu(OH)2 |
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| d. | Calamine | IV. | ZnCO3 |
Choose the correct answer from the option given below.
