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An ore of aluminium is...

An ore of aluminium is

A

`Al^(3+)` is oxidised to Al(s) .

B

graphide anode is oxidised to carbon monoxide and carbon dioxide .

C

oxidation state of oxygen changes in the reaction at anode .

D

oxidation state of oxygen changes in the overall reaction involved in the process .

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. In the extraction of copper from its sulphide ore, the metal is formed...

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  2. During the electrolysis of NaCl solution, the gas liberated at the ano...

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  3. An ore of aluminium is

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  4. Electrolytic refining is used to purify which of the following metals ...

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  5. Extraction of gold and silver involves leaching the metal with CN^- io...

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  6. Answer the question on the basis of figure given below : Choose th...

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  7. Answer the question on the basis of figure given below : Below poi...

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  8. Answer the question on the basis of figure given below : For the r...

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  9. In the following questions two or more options may be correct. At the ...

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  10. In the following questions two or more options may be correct. Which o...

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  11. In the extraction of aluminium by Hall-Heroult process, purified Al2O3...

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  12. Which of the following statements is correct ?

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  13. In the Froth Floatation process, zinc sulphide and lead sulphide can b...

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  14. Common impurities present in bauxite are .

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  15. Which of the following ores are concentrated by froth floation ?

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  16. Which of the following reactions occur during calcination?

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  17. For the metallurgical process of the ores calcined ore can be reduced ...

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  18. The main reactions occurring in blast furnace during extraction of iro...

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  19. In which of the following method of purification, metal is converted t...

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  20. Which of the following statements are correct ?

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