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In the electrolytic reduction of pure Al...

In the electrolytic reduction of pure `Al_2O_3`. Fluorspar `(CaF_2)` is added to

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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A, B
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In the electrolytic reduction of pure alumina to pure aluminium - by Hall Herault's process, give the electrolytic reaction involved in the same, resulting in formation of aluminium at the cathode.

The Gibbs energy for the decomposition of Al_(2)O_(3) at 500^(@)C is as follows: (2)/(3)Al_(2)O_(3) rarr (4)/(3)Al + O_(2), Delta_(r)G = +966kJ mol^(-1) The potential difference needed for electrolytic reduction of Al_(2)O_(3) at 500^(@)C is at least:

The Gibbs energy for the decomposition of Al_(2)O_(3) at 500^(@)C is as follows: (2)/(3)Al_(2)O_(3) rarr (4)/(3)Al + O_(2), Delta_(r)G = +966kJ mol^(-1) The potential difference needed for electrolytic reeduction of Al_(2)O_(3) at 500^(@)C is at least:

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

The funciton of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to :

Extraction of aluminium can be understood by : Electrolytric reduction of Al_(2) O_(3) : Electrolysis : Al_(2) O_(3) + Cryolite + CaF_(2) Cathode : Carbon inside the Fe container Anode : Graphite rods. The function of fluorspar (CaF_(2)) is.

Extraction of aluminium can be understood by : Electrolytric reduction of Al_(2) O_(3) : Electrolysis : Al_(2) O_(3) + Cryolite + CaF_(2) Cathode : Carbon inside the Fe container Anode : Graphite rods. The purpose of adding cryolite is.

Extraction of aluminium can be understood by : Electrolytric reduction of Al_(2) O_(3) : Electrolysis : Al_(2) O_(3) + Cryolite + CaF_(2) Cathode : Carbon inside the Fe container Anode : Graphite rods. The molten electrolytes contain Na^(oplus),Al^(3+) and Ca^(2+) but only Al gets deposited at cathode because,

CENGAGE CHEMISTRY ENGLISH-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. In the electrolytic reduction of pure Al2O3. Fluorspar (CaF2) is added...

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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. Which of the following metals cannot be obtained by electrolysis /

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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 called as Roasting. True/Fal...

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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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