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The reducing agent in electrolysis of al...

The reducing agent in electrolysis of alumina 

A

`CaF_2`

B

`Na_2AIF_6`

C

Graphite

D

`Al_2O_3`

Text Solution

Verified by Experts

The correct Answer is:
C
Graphite anodes act as reducing agent.
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KUMAR PRAKASHAN-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-SECTION - E (DARPAN.S EXAM ORIENTED MCQs)
  1. Which principle is involved in chromatography ?

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  2. Cast iron is not used in ..........

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  3. The reducing agent in electrolysis of alumina

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  4. Which ore has more than one metal present in it ?

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  5. Copper matte is .........

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  6. The methods cheifly used for the extraction of lead and zinc from thei...

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  7. The ore after concentration is found to have basic impurities. Which o...

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  8. Which of the following metals are extracted by hydrometallurgy?

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  9. The metallurgical process in which the metal obtained in fused state i...

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  10. Which of the following acts an activator in froth floatation process ?

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  11. Which of the following acts as neutral refractories ?

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  12. In cyanidation of gold and silver the formation of HCN is prevented by...

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  13. CO is used in metallurgy of ..

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  14. In blast furnace, Fe2O3 is reduced by .......

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  15. Poling process is used .........

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  16. Alumina with considerable impurity of silica is purified by .......

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  17. Silver with impurity of lead is refined by .........

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  18. Copper is extracted from its ore copper pyrite throupgh the scheme giv...

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  19. The formula of azurite is ...........

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  20. A black mineral on roasting breaks up into two compounds A and B with ...

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