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प्रश्न
What are the differences between minerals and ores?
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उत्तर
Minerals:
- Minerals contain a low percentage of metal.
- Metal cannot be extracted easily from minerals.
- Clay \[\ce{Al2O3.SiO2.2H2O}\] is the mineral of aluminium.
Ores:
- Ores contain a large percentage of metal.
- Ores can be used for the extraction of metals on a large scale readily and economically.
- Bauxite \[\ce{Al2O3.2H2O}\] is the ore of aluminium.
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संबंधित प्रश्न
What is the role of cryolite in the extraction of aluminium?
What is the role of CO in the extraction of Iron?
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
Copper has the face centred cubic structure. The coordination number of each ion is:
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) \[\ce{ZnS + 3/2 O2 -> ZnO + SO2}\]
In the thermite process, the reducing agent is:
In the electrolytic process for the extraction of aluminium the electrolyte is:-
Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
Match List - I with List - II.
| List - I | List - II | ||
| (One) | (Composition) | ||
| (A) | Siderite | (I) | FeCO3 |
| (B) | Malachite | (II) | CuCO3 · Cu(OH)2 |
| (C) | Sphalerite | (III) | ZnS |
| (D) | Calamine | (IV) | ZnCO3 |
Choose the correct answer from the options given below:
