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Aluminium is prepared in large quantitie...

Aluminium is prepared in large quantities by

A

Heating cryolite in a limited quantity of air

B

Reducing aluminium oxide with coke

C

Reducing aluminium oxide with sodium

D

Electrolysing aluminium oxide dissolved in fused electrolyte

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The correct Answer is:
D
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ERRORLESS-GENERAL PRINCIPLES & PROCESSES OF ISOLATION OF ELEMENTS-NCERT BASED QUESTIONS (Reduction of Free Metal)
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  2. The electrolytic method of reduction is employed for the preparation o...

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  3. Aluminium is prepared in large quantities by

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  4. Thermite process is used to extract metals

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  5. Iron is obtained on a large scale from Fe2O3 by

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  6. After partial roasting, the sulphide of copper is reduced by

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  7. In the metallurgical extraction of zince from ZnO the reducting agent ...

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  8. The metal oxide which cannot be reduced to metal by carbon is

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  9. Which process of reduction of mineral to the matel is suited for the e...

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  10. Which of the following reaction is an example of autoreduction?

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  11. In the extraction of Cu from its sulphide ore, the metal is formed by ...

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  12. Elecyroltic refining is used to purify which of the following metals?

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  13. When copper pyrites is roasted in excess of air, a mixture of CuO + Fe...

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  14. Matte contains mainly

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  15. The metallurgical process in which a metal is obtained in a fused stat...

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  16. The slag obtained during the extraction of copper from coper pyrites i...

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  17. Flux is used to remove

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  18. In blast furnace, iron oxide is reduced by

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  19. In the alumino thermite process aluminium acts as

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  20. Which metal can't be obtained from electrolysis

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