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Aluminium is extracted from alumina (Al(...

Aluminium is extracted from alumina `(Al_(2)O_(3))` by electrolysis of a molten mixture of ……….

A

`Al_(2)O_(3)+KF+Na_(3)AlF_(6)`

B

`Al_(2)O_(3)+HF+NaAlF_(4)`

C

`Al_(2)O_(3)+HF+NaAlF_(4)`

D

`Al_(2)O_(3)+Na_3AlF_(6)+CaF_(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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FULL MARKS-METALLURGY -Additional questions ( CHOOSE THE BEST ANSWER )
  1. Heating mixture of Cu(2)O and Cu(2)S will give……..

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  2. Which of the following pairs of metals is puridied by Van-Arkel method...

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  3. Aluminium is extracted from alumina (Al(2)O(3)) by electrolysis of a m...

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  4. The ore which contains both copper and iron….

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  5. Match the etraction processes listed in column-I with metals listed in...

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  6. The chief ore of Aluminium is

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  7. Which one of the following metal having least chemical reactive?

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  8. Pick out the more reactive metal

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  9. Consider the following statements. (i)All ores ar minerals but all m...

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  10. Match the List-I and List-II correctly using the code given below.

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  11. The impurities associated with ores is……

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  12. Oxide ores are concentrated by………

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  13. Heaematite and tin stone are purified by …………

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  14. Froth flotation process is suitable for concentrating …………… ores.

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  15. Copper pyrite and zinc blende are purified by……..

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  16. Frothing agents used to separate ZnS from PbS is……

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  17. Depressing agents used to separate ZnS from PbS is ……..

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  18. Leaching is also called as……..

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  19. In the leaching process ,the metal present in the ore is converted int...

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  20. Gold ore is concentrated by…….

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