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The diagram shows the sketch of an elect...

The diagram shows the sketch of an electrolytic cell used in the extraction of aluminium.

Why is it necessary for electrode 'B' to be continuously replaced?

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Electrode .B. is periodically replaced because it gets oxidised to carbon dioxide.
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S CHAND IIT JEE FOUNDATION-METALS AND NON METALS-QUESTION BANK-15
  1. The diagram shows the sketch of an electrolytic cell used in the extra...

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  2. The diagram shows the sketch of an electrolytic cell used in the extra...

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  3. The diagram shows the sketch of an electrolytic cell used in the extra...

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  4. In the electrolytic refining of a metal M, what would you take as the ...

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  5. On placing a piece of zinc metal in a solution of mercuric chloride, i...

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  6. Name two metals that do not corroide easily. Give an example in suppor...

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  7. Food cans are coated with tin and not with zinc because

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  8. Four students A, B, C, and D took aqueous solutions of zinc sulphate a...

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  9. Which of the following pairs will give displacement reactions?

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  10. Which of the following methods is suitable for preventing an iron fryi...

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  11. An element reacts with oxygen to give a compound with a high melting p...

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  12. A piece of granulated zinc was dropped into copper sulphate solution. ...

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  13. Give reason: Metals like palladium, silver and gold are used to make...

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  14. Give reason: Sodium, potassium and lithium are stored under oil

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  15. Give reason: Aluminium is a highly reactive metal, yet it is used to...

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  16. give reason for the following: Carbonate and sulphide ores are usual...

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  17. Give reason: Metals are regarded as electropositive elements

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  18. Give reason: Carbon is not used for making aluminium from aluminium ...

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  19. Give reason: Metals conduct electricity

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  20. Metallic oxides of zinc, magnesium and copper were heated with the fol...

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