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

What is the role of `ZnCl_(2)` in dry cell ?

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`ZnCl_(2)` combines with the `NH_(3)` produced to form a complex salt `[Zn(NH_(3) )_(2) ]Cl_(2)` .
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CBSE COMPLEMENTARY MATERIAL-ELECTROCHEMISTRY -VERY SHORT ANSWER TYPE QUESTIONS (1 Mark)
  1. Why is it not possible to measure the single electrode potential ?

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  2. Name the factor on which emf of a cell depends.

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  3. What is the effect of temperature on the electrical conductance of met...

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  4. What is the effect of temperature on the electrical conductance of ele...

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  5. What is the relation between conductance and conductivity ?

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  6. Reduction potentials of 4 metals A, B, C and D are - 1.66 V, + 0.34 V,...

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

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  8. Why Na cannot be obtained by the electrolysis of aqueous NaCl solution...

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  9. What is the use of platinum foil in the hydrogen electrode ?

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  10. Why Lambda(m)^(@)" for "CH(3)COOH cannot be determined experimentally ...

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  11. Why is it necessary to use a salt bridge in a galvanic cell ?

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

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

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  14. Why does the conductivity of a solution decrease with dilution ?

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  15. Suggest two materials other than hydrogen that can be used as fuels in...

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  16. How does the pH of Al-NaCl solution be affected when it is electrolyse...

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  17. Which reference electrode is used to measure the electrode potnetial o...

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

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

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  20. What is the electrolyte used in a dry cell ?

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