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In the elactrolytic extraction of alumin...

In the elactrolytic extraction of aluminium, cryolite is used.

A

Lower the melting point of alumia

B

Increase the melting point of alumina

C

Remove impurities from alumina

D

Minimise the anodic effect

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The correct Answer is:
A
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NARAYNA-METTALURGY-Single Answer Questions
  1. When the ore haematite is burnt in air with coke around 2000 K along w...

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  2. In the commercial electrochemical process for aluminium extraction, th...

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  3. In the elactrolytic extraction of aluminium, cryolite is used.

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  5. The chemical processes in the production of steel from haematite ore i...

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  6. The chemical composition of slag formed during the smelting process in...

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  7. In the metallurgy of iron, when limestone is added to the blast furnac...

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  8. Which of the following process is used in the extractive metallurgy of...

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

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  10. In the process of extraction of gold, Roasted gold ore +CN^(-)+H2Oov...

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  11. Two ores A1 and A2 of a metal M show the following reactivity: A...

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  12. Pb and Sn are exerted from their chief ores by:

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  13. Which ore contains both iron and copper?

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  14. Match the extraction processes listed in column I with metals listed i...

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  15. Extraction of zinc from zinc blende is achieved by:

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  16. Black tin is

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  17. Match the conversions in Column I with the type(s) of reaction(s) give...

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  18. When the sample of copper with the zinc impurity is to be purified by ...

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  19. Cyanide proces is used for the extraction of

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  20. Aluminium is extracted in the electrolysis of :

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