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In the electrolysis of alumina, cryolite...

In the electrolysis of alumina, cryolite is added to :

A

Lower the melting point of alumina and to increase the conductivity

B

Minimise the anode effect

C

Remove impurities from Alumina

D

None of the above

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The correct Answer is:
A
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MBD PUBLICATION-GENERAL PRINCIPLES OF ISOLATION OF ELEMENTS-QUESTION BANK
  1. Which contains both Ca and Mg ?

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  2. Heating of ores with flux to remove non fusible mass is called:

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  3. In the electrolysis of alumina, cryolite is added to :

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  4. The process of converting hydrated alumina into anhydrous alumina is c...

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  5. Which of the following statement regarding the metallurgy of magnesium...

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  6. In the metallurgy of zinc , the zinc dust obtained from roasting and r...

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  7. Some of the metals occur in the native state in nature because they :

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  8. Complex formation or cyanide method is used for the extraction of :

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  9. An essential constituent of amalgam is :

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  10. Mercury is transported in metal containers made up of :

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  11. Impurities physically associated with minerals are:

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  12. In concentration process of minerals by froth foloatation method , the...

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  13. The ore that is concentrated by froth floatation process is

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  14. Which consists of only one element ?

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  15. Metallurgy is the process of :

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  16. The second most common element in the universe is :

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  17. The main function of roasting is :

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  18. A and B are two allotropes of an element . One gram of B in :

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  19. An element A dissolves both in acid and alkali. It is an example of :

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  20. In metallurgy , flux is a substance used to convert :

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