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Aluminium metal is purified by :...

Aluminium metal is purified by `:`

A

electrolyzing `Al_(2)O_(3)` dissolve in `Na_(2)AlF_(6)`

B

reducing `Al_(2)O_(3)` with coke

C

reducing `AlO_(3)` with chromium

D

heating `Al_(2)O_(3)` and cryolite

Text Solution

Verified by Experts

The correct Answer is:
A
`Al` from `AlO_(3)` can be obtained only by electrolysis of fused `Al_(2)O_(3)` dissolve in `Na_(3)AIF_(6)`.
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A2Z-P BLOCK ELEMENTS ( Group 13 -14)-Section D - Chapter End Test
  1. Aluminium metal is purified by :

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  2. Which of the following has the minimum heat of dissociation?

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  3. Electrolytic reduction of alumina to aluminium by Hall-Heroult process...

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  4. Aluminium metal is purified by :

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  5. The major role of flourspar, CaF(2) which is added in small amount in ...

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  6. In Goldschmidt reaction, certain metallic oxides are reduced to the me...

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  7. In the electrolysis of alumina, cryolite is added to

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  8. Specify the coordinate geometry around and hyridilization present abou...

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  9. The geometry and the hybirdisation present about the central atom in B...

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  10. Which of the following statements is correct?

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  11. H(3)BO(3) is.

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  12. How can the following reaction be made to proceed in forward direction...

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  13. Which halide is stable and has doubtful existence?

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  14. The correct order of decreasing C-O bond length of (1) CO,(II)CO(3)^(2...

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  15. Which is neutral to litmus?

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  16. (Me)(2) SiCl(2) on hydrolysis will produce.

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  17. Pb and sSn are exerted from their chief ores by:

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  18. PbO(2)on rection with HNO(3) gives gas:

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  19. An aqueous solution of a substance gives a white percipitate on treatm...

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  20. The name of the structure of silicates in which three oxygen atoms of ...

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  21. Which one of the following orders presents the correct sequence of the...

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