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Chemical leaching is useful in the conce...

Chemical leaching is useful in the concentration of:

A

Carnallite

B

Bauxite

C

Calamine

D

Haematite

Text Solution

Verified by Experts

The correct Answer is:
B
`Al_(2)O_(3)(s) + 2NaOH (aq) + 3H_(2)O(I) rarr 2Na[Al(OH)_(3)]`
`2Na[Al(OH)_(4)](aq) + CO_(2)(g) rarr Al_(2)O_(3).xH_(2)O(s)`
`2NaHCO_(3)(aq)`
`Al_(2)O_(3).xH_(2)O(s) overset(1470K)rarr Al_(2)O_(3)(s) + xH_(2)O(g)`
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PHYSICS WALLAH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Level II
  1. The rocky and siliceous matter associated with an ore is called:

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  2. Which of the following is not the ore of aluminium?

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  3. Chemical leaching is useful in the concentration of:

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  4. Process of heating ore is air to remove sulphur is:

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  5. When limestone is heated CO(2) gas is liberated. In metallurgy, this p...

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  6. Which of the following metals is obtained by the self reduction proces...

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  7. Self-reduction of Cu(2)S to Cu can be carried out in.

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  8. Identify the metal M whose extraction is based on the following reacti...

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  9. Cyanide solution is used in the extraction of

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  10. Ellingham diagram represents:

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  11. Which of the following reactions represents the smelting process?

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  12. The reaction 2PbS + 3O(2) rarr 2PbO + 2SO(2) used is the extractive me...

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  13. The iron obtained from the blast furnace is called:

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  14. Which of the following fluxes is used to remove acidic impurities in ...

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  15. The metal which is obtained from both sea-water and ore from the earth...

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  16. Which metal is extracted using a hydrometallurgical process involving ...

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  17. Which of the following metals cannot be extracted by the carbon reduct...

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  18. Electrolyte reduction method is used in the extraction of

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  19. In haematite extraction, limestone is used as

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  20. Aluminium metal is purified by:

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