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Which metals can be used in the cathodic...

Which metals can be used in the cathodic protection of `Fe` against rusting.

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A metal which is more electropositive than `Fe`, such as `Mg,Zn,` and `Al`.
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(i) Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals. (ii) Ionic compounds have generally high melting points. (iii) Hydrogen is not a metal but is has been assigned a place in the reactivity series of metals. (iv) The galvanised iron article is protected against rusting even if the zinc layer is broken.

Which among the following metals is employed to provide cathodic protection to iron ?

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CENGAGE CHEMISTRY-NCERT BASED EXERCISE-Electrolysis, Batteries , and Rusting
  1. What is electrochemical equivalent of a substance ?

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  2. An aqueous solution of CuSO(4) is electrolyszed using Pt electrodes in...

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  3. What are the products of the electrolysis of aqueous solution of KF ?

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  4. Silver is conducting as such while AgNO(3) is conducting in molten sta...

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  5. Why Zn reacts with dilute H(2)SO(4) to give H(2) gas but Cu does not ?

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  6. What is overvolatage or bublle voltage ?

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  7. Which allotrope of carbon is used for making electrodes?

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  8. Which electrolyte is used in dry cell ?

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  9. What would happen if the protective tin coating over an iron bucket i...

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  10. Which metals can be used in the cathodic protection of Fe against rust...

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  11. Name the electrodes used in a fuel cell.

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  12. Name the electrolyte used in fuel cell and mercury cell.

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  13. Rusting of Fe is quicker in saline water than in ordinary water. Why ?

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  14. Why Cr is used for coating Fe ?

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  15. What is the role of ZnCl(2) in dry cell ?

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  16. Why a mercury cell gives a constant voltage throughout its life ?

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  17. Which types of cells are rechargeable ?

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  18. Why a dry cell becomes dead after a long time even if it is not used ?

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  19. Why lead storage can be recharged ?

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  20. Out of Sn and Zn which one protects Fe better even after cracks ?

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