Electrochemistry

Bihar Board Class 12 · Chemistry · 41 past questions

1. Q1 2026 Set A

   Which of the following equations represents the Faraday's first law of electrolysis ?

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2. Q2 2026 Set A

   On increasing dilution, the specific conductance of an electrolyte

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3. Q3 2026 Set A

   The standard reduction potentials of metals $A$, $B$, $C$ and $D$ are $-3.05$, $-1.66$, $-0.40$ and $+0.80$…

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4. Q4 2026 Set A

   Which of the following is a secondary cell?

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5. Q5 2025 Set D

   The electromotive force of the following cell is…

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6. Q6 2025 Set D

   The unit of specific conductance is

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7. Q7 2025 Set D

   In electrolysis, oxidation takes place at

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8. Q8 2025 Set D

   The quantity of electricity required to liberate 32 g of oxygen is

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9. Q9 2025 Set D

   Rust is

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10. Q10 2024 Set D

    A charge of 96500 coulomb liberates .............. from the solution of CuSO$_4$.

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11. Q11 2024 Set D

    The electromotive force of the cell Zn | ZnSO$_4$ || CuSO$_4$ | Cu is 1.1 volt. Its cathode is

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12. Q12 2024 Set D

    Who gave the theory of ionisation ?

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13. Q13 2024 Set D2023 Set F

    The cell constant of a conductivity cell is

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14. Q14 2023 Set F

    Which of the following is deposited at cathode on electrolysis of aqueous NaCl solution ?

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15. Q15 2023 Set F

    Which of the following conducts electricity in a solution ?

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16. Q16 2023 Set F

    The standard electrode potentials of $A$, $B$, $C$ and $D$ metals are $-3.05$ V, $-1.66$ V, $-0.40$ V and…

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17. Q17 2022 Set E

    1 Faraday is equal to

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18. Q18 2022 Set E

    What happens when a lead storage battery is charged ?

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19. Q19 2022 Set E

    The standard electrode potentials for the following reactions are given (At 25°C)…

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20. Q20 2022 Set E

    Hydrogen-oxygen cell is which of the following types of cell ?

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21. Q21 2021 Set A

    The standard reduction potential values of elements $A$, $B$ and $C$ are $+0.68$ V, $-2.50$ V and $-0.50$ V…

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22. Q22 2021 Set A

    The best way to protect iron from rusting is

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23. Q23 2021 Set A

    $Zn(s) | Zn^{2+}(aq) || Cu^{2+}(aq) | Cu(s)$ is

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24. Q24 2021 Set A

    How much charge is required for reduction of 1 mole of $Al^{3+}$ to Al?

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25. Q25 2021 Set A

    The Electromotive force (EMF) of the cell for the cell reaction at equilibrium state is

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26. Q26 2019 Set D

    One Faraday electricity is equal to how much Coulombs?

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27. Q27 2018

    A dilute aqueous solution of sodium fluoride is electrolyzed; the products at the anode and cathode are-

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28. Q28 2018

    The correct order of equivalent conductance at infinite dilution of $LiCl, NaCl$ and KCl is…

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29. Q29 2018

    Equivalent conductance of saturated $BaSO_4$ is 400 ohm$^{-1}$cm$^2$eqvt$^2$ and specific conductance is…

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30. Q30 2018

    For the reaction shown, pH is equal to 2, electric potential is- (with a figure)

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31. Q31 2018

    Define electrode and electrode potential.

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32. Q32 2018

    Define specific conductance & equivalent conductance.

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33. Q33 2018

    Construct electric cells for the following reactions –

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34. Q34 2017

    When one faraday of electric current is passed, the mass deposited, is equal to-

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35. Q35 2017

    State and explain faraday's 2nd law of electrolysis.

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36. Q36 2017

    What is specific conductance and molar conductance?

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37. Q37 2016

    Faraday's law of electrolysis is related to

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38. Q38 2016

    Define standard electrode potential.

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39. Q39 2016

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40. Q40 2015

    If 96500 coulomb of electricity is passed through CuSO$_4$ soluton,it will liberate

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41. Q41 2015

    How many moles of Cu will be deposited by passing 24125 coulombs of electric current from CuSO$_4$ solution?

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