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Electrochemistry

CBSE Class 12 · Chemistry · 28 past questions

  1. Q1 2026
    Consider the following reaction…
  2. Q2 2026
    Calculate emf of the following cell at 298 K…
  3. Q3 2026
    What will happen during the electrolysis of aqueous solution of CuCl$_2$ by using platinum electrodes ?
  4. Q4 2026
    Calculate emf and $\Delta G$ for the following cell at 298 K…
  5. Q5 2026
    On electrolysis of very dilute aqueous solution of NaCl using platinum electrodes…
  6. Q6 2025
    In an electrochemical cell, the following reaction takes place…
  7. Q7 2025
    What amount of electric charge is required for the reduction of 1 mole of $\mathrm{MnO_4^-}$ into…
  8. Q8 2025
    For Questions number 13 to 16, two statements are given — one labelled as Assertion (A) and the other…
  9. Q9 2025
    The charge required for the reduction of 1 mol of $\mathrm{MnO_4^-}$ to $\mathrm{MnO_2}$ is
  10. Q10 2025
    For question number 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled…
  11. Q11 2025
    The electrical resistance of a column of 0.05 M NaOH solution of area 0.8 cm$^2$ and length 40 cm is…
  12. Q12 2025
  13. Q13 2025
    Standard electrode potential for $Sn^{4+}/Sn^{2+}$ couple is +0.15 V and that for the $Cr^{3+}/Cr$ couple is…
  14. Q14 2024
    During electrolysis of aqueous solution of NaCl…
  15. Q15 2024
    Calculate emf of the following cell…
  16. Q16 2024
    During the electrolysis of aqueous NaCl, the cathodic reaction is…
  17. Q17 2024
    The conductivity of 0.2 M solution of KCl is $2.48 \times 10^{-2}$ S cm$^{-1}$. Calculate its molar…
  18. Q18 2024
    Calculate the potential of Iron electrode in which the concentration of Fe$^{2+}$ ion is 0·01 M.…
  19. Q19 2023
    Which of the following solutions of KCl will have the highest value of molar conductivity ?
  20. Q20 2023
    **Assertion (A) :** Conductivity decreases with decrease in concentration of electrolyte.…
  21. Q21 2023
    (a) Conductivity of $2 \times 10^{-3}$ M methanoic acid is $8 \times 10^{-5}$ S cm⁻¹. Calculate its molar…
  22. Q22 2023
    Kohlrausch gave the following relation for strong electrolyte…
  23. Q23 2023
    For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other…
  24. Q24 2023
    The correct cell to represent the following reaction is…
  25. Q25 2023
    $\Delta G$ and $E^\circ_{cell}$ for a spontaneous reaction will be…
  26. Q26 2023
    On diluting two electrolytes 'A' and 'B', the $\Lambda_m$ of 'A' increases 25 times while that of 'B'…
  27. Q27 2022
    Write the Nernst equation for the following cell reaction…
  28. Q28 2022