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The major role of flourspar, CaF(2) whic...

The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction of `Al_(2)O_(3)` dissolved on fused cryolite in fused cryolite is

A

To increase the conductivity of the fused mixture

B

To lower the fusion temperature of the melt

C

To act as catalyst

D

To decrease the rate of oxidation of carbon of carbon at the anode

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The correct Answer is:
A, B
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (Multiple Correct)
  1. According to Ellingham diagram the oxidation reaction of carbon and ca...

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  2. Which of the following statements are correct regarding metallurgy of ...

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

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  4. Which is correct process-mineral group in metallurgical extraction ?

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  5. Tempering of steel

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  6. Out of the following reduction processes : (i) Fe(2)O(3) + 3C rarr 2...

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  7. Out of the following matals that cannot be obtained by electrolysis of...

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  8. Silver containing lead as an impurity is not purified by

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  9. Select the correct statements for Ellingham diagram.

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  10. Which of the following statements is/are correct ?

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  11. Which of the following pairs consists of ore the same metal ?

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  12. Which of the following metal oxides are reduced by self-reduction meth...

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  13. Disadvantages of using carbon as a reducing agent :

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  14. Select the correct statements :

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  15. Froth flotation process used for the concentration of sulphide ore.

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  16. Which of the following steps are involved in hydrometallurgical proces...

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  17. The reduction of an oxide by aluminium is not called

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  18. For the pyrometallurgical method used for the extraction of copper fro...

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  19. In Fe extraction, the roasting is carried out because

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  20. Select the correct statements (Ellingham diagram) :

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