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What is overvoltage?...

What is overvoltage?

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Statement-1: During electrolysis of H_(2)SO_(4),H_(2) and O_(2) are liberated under normal concentrations and H_(2)S_(2)O_(8) at higher concentrations and lower temperature. Statement-2: Liberation of H_(2) and O_(2) at elecrode requires some potential drop known as overvoltage.

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PRADEEP-ELECTROCHEMISTRY-ADDITIONAL QUESTIONS(VERY SHORT ANSWER QUESTIONS)
  1. How is free energy change of a cell reaction related to (i) its emf (i...

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  2. Is free enegy change of a cell reaction an intensive property or exten...

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  3. What is overvoltage?

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  4. Write the product obtained at anode on electrolysis of concentrated su...

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  5. Name the electrolyte used in (i) dry cell (ii) mercury cell.

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  6. What is a primary cell? Give an example.

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  7. Give an example of a secondary cell.

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  8. Write the name of a cell used in small watches.

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  9. Which cells were used in the Apollo space program? What was the produc...

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  10. Define fuel cell?

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  11. How does H(2)-O(2) fuel cell operate?

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  12. State two advantages of H(2)-O(2) fuel cell over ordinary cell.

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  13. Write the name of the electrolyte used in fuel cell.

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  14. What is the overall electrochemical reaction taking place in rusting?

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  15. Out of zinc and tin which one protects iron better even after cracks a...

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  16. Define corrosion. What is the chemical formula of rust ?

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  17. Why Cr is used for coating Fe ?

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

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

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  20. Rusting of Fe is quicker in saline water than in ordinary water.

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