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Chemistry - Electrochemistry

Practise 59 KCET previous year questions on Electrochemistry, compiled from papers spanning 2008 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KCET tests.

Electrochemistry has been asked in 19 of the 20 years of KCET papers analysed (2007–2026), with 59 questions in all. 39% of them were easy, 41% moderate and 20% tough. Most of its questions came from 2012, with 5 questions that year. In the last three years (2024–2026) it had 11 questions across 3 papers, about 3.7 per paper.

The chapter's 3 topics are not weighted equally: Cells and Electrode Potential, Nernst Equation (38 questions, 64%), Conductance and Conductivity (13 questions, 22%), and Commercial Cells and Batteries (8 questions, 14%) have been asked the most. Cells and Electrode Potential, Nernst Equation has also led over the last five years, with 10 questions. Cells and Electrode Potential, Nernst Equation has produced the most tough questions (7).

  1. 1During the electrolysis of acidified water, g of gas is formed at anode. The volume of gas liberated at cathode under STP conditions is2026Cells and Electrode Potential, Nernst Equation
  2. 2is equal to ____2026Conductance and Conductivity
  3. 3Given below are the half-cell reactions: The for will be _____________.2026Cells and Electrode Potential, Nernst Equation
  4. 4The conductivity of centimolar solution of KCl at K is and the resistance of the cell containing the solution at K is . The value of cell co2026Conductance and Conductivity
  5. 5The correct statement/s about Galvanic cell is/are (a) Current flows from cathode to anode (b) Anode is positive terminal (c) If , then it i2025Cells and Electrode Potential, Nernst Equation
  6. 6The electronic conductance depends on2025Conductance and Conductivity
  7. 7For a given half cell, on increasing of aluminium ion, the electrode potential will2025Cells and Electrode Potential, Nernst Equation
  8. 8Match the following select the correct option for the quantity of electricity, in required to deposit various metals at cathode {array}{|l|l2025Cells and Electrode Potential, Nernst Equation
  9. 9How many coulombs are required to oxidise 0.1 mole of to oxygen?2024Cells and Electrode Potential, Nernst Equation
  10. 10A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 s . The mass of calcium deposited is (Molar mass of )2024Cells and Electrode Potential, Nernst Equation
  11. 11The value of ' ' in the equation is same for the pair2024Conductance and Conductivity
  12. 12The resistance of weak acid in a conductivity cell is . The cell constant of the cell is and of acid is . The of the solution is2023Conductance and Conductivity
  13. 13During the electrolysis of brine, by using inert electrodes,2023Cells and Electrode Potential, Nernst Equation
  14. 14Consider the following 4 electrodes Then reduction potential in volts of the electrodes in the order.2023Cells and Electrode Potential, Nernst Equation
  15. 15In fuel cells are used as catalysts.2022Commercial Cells and Batteries
  16. 16The molar conductivity is maximum for the solution of concentration2022Conductance and Conductivity
  17. 17For spontaneity of a cell, which is correct?2022Cells and Electrode Potential, Nernst Equation
  18. 18Specific conductance of is . The molar conductance of the solution is2022Conductance and Conductivity
  19. 19Consider the following electrodes M) electrode potentials of the above electrodes in volts are in the order2021Cells and Electrode Potential, Nernst Equation
  20. 20The resistance of solution at is . If the conductivity of solution at is . The cell constant of the conductivity cell in is2021Conductance and Conductivity
  21. 21at for the cell is . The equilibrium constant at is2021Cells and Electrode Potential, Nernst Equation
  22. 22The pair of electrolytes that posses same value for the constant in the Debye-Huckel-Onsager equation, is2020Conductance and Conductivity
  23. 23Given and . The equilibrium constant for the reaction taking place in galvanic cell consisting of above two electrodes is2020Cells and Electrode Potential, Nernst Equation
  24. 24In which of the following cases a chemical reaction is possible?2020Cells and Electrode Potential, Nernst Equation
  25. 25One litre solution of \( {MgCl}_{2} \) is electrolyzed completely by passing a current of \( 1 {~A} \) for \( 16 5 \) sec. The original conc2019Cells and Electrode Potential, Nernst Equation
  26. 26An aqueous solution of \( {CuSO}_{4} \) is subjected to electrolysis using inert electrodes. The \( {pH} \) of the solution will2019Cells and Electrode Potential, Nernst Equation
  27. 27Given: \( E_{M n^{+7}}^{0} M n^{+2}=1.5 {~V} \) and \( E_{M n^{+4}}^{0} M n^{+2}=1.2 {~V} \), then \( E_{M n^{+7}}^{0} M n^{+4} \) is2019Cells and Electrode Potential, Nernst Equation
  28. 28Addition of excess of \( {AgNO}_{3} \) to an aqueous solution of \( 1 \) mole of \( {PdCl}_{2} 4 {NH}_{3} \) gives \( 2 \) moles of \( {AgCl2019Conductance and Conductivity
  29. 29For a cell reaction involving two electron changes, \( E_{ {cell }}^{ }=0.3 {~V} \) at \( 25^{ } {C} \). The cell equilibrium constant of th2018Cells and Electrode Potential, Nernst Equation
  30. 30The charge required for the reduction of \( 1 \) mole of \( {MnO}_{4}{ }^{-} \)to \( {MnO}_{2} \) is2018Cells and Electrode Potential, Nernst Equation
  31. 31At a particular temperature, the ratio of molar conductance to specific conductance of \( 0.01 {M} \) \( {NaCl} \) solution IS2018Conductance and Conductivity
  32. 32The electronegativities of \( {C}, {N}, {Si} \) and \( {P} \) are in the order of2017Commercial Cells and Batteries
  33. 33In the manufacture of hydrogen from water gas \( ( {CO}+ {H}_{2} ) \), which of the following is correct statement?2017Cells and Electrode Potential, Nernst Equation
  34. 34Bactericidal antibiotics among the following is2017Cells and Electrode Potential, Nernst Equation
  35. 35Which of the following is incorrect in a galvanic cell?2016Commercial Cells and Batteries
  36. 36A secondary cell is one2016Commercial Cells and Batteries
  37. 37The amount of current in Faraday is required for the reduction of \( 1 {~mol} \) of \( {Cr}_{2} {O}_{7}{ }^{2-} \) ions to \( C r^{3+} \) is2016Commercial Cells and Batteries
  38. 38While charging the lead storage battery,2015Commercial Cells and Batteries
  39. 39\( {H}_{2} {O}_{2} \) cannot oxidise2015Commercial Cells and Batteries
  40. 40In \( {H}_{2}- {O}_{2} \) fuel cell the reaction occurring at cathode is2015Commercial Cells and Batteries
  41. 41How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen?2015Cells and Electrode Potential, Nernst Equation
  42. 42Gold Sol is not2014Cells and Electrode Potential, Nernst Equation
  43. 43\[ {array}{l} M n O_{2}+H C l- \\ A_{(g)}+F_{2}( { excess })_{--}>->B_{(g)} \\ B_{(l)}+U_{(s)}- C_{(g)}+D_{(g)} {array} \] The gases \( A, B2014Cells and Electrode Potential, Nernst Equation
  44. 44Alkali metals have negative reduction potential and hence they behave as2013Cells and Electrode Potential, Nernst Equation
  45. 45The emf of a galvanic cell constituted with the electrodes and is2013Cells and Electrode Potential, Nernst Equation
  46. 46The equilibrium constant of a reaction is at . The standard free energy change of the reaction at the same temperature is2012Cells and Electrode Potential, Nernst Equation
  47. 47Which one of the following has a potential more than zero?2012Cells and Electrode Potential, Nernst Equation
  48. 48The approximate time duration in hours to electroplate 30 of calcium from molten calcium chloride using a current of is [At. mass of ]2012Cells and Electrode Potential, Nernst Equation
  49. 49The equilibrium constant of the reaction is2012Cells and Electrode Potential, Nernst Equation
  50. 50of acetic acid is completely neutralized using a standard solution of . The volume of ethane obtained at STP after the complete electrolysis2012Cells and Electrode Potential, Nernst Equation

Frequently Asked Questions

1.How many questions are available for Electrochemistry?

This chapter includes 59 questions compiled from KCET papers spanning 2008 to 2026.

2.Are these questions only from KCET, or from other exams too?

These are KCET questions specifically for the Electrochemistry chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Electrochemistry an important chapter for KCET Chemistry?

Electrochemistry has appeared in 19 of the 20 years of KCET papers covered here, with 59 questions across 19 papers - about 3 per paper it appears in.

4.What is the difficulty level of Electrochemistry questions in KCET?

Of the 59 questions analysed for this chapter, 39% are easy, 41% moderate and 20% tough. 2012 had the most, with 5 questions.

5.Which topics in Electrochemistry should I focus on?

These topics have carried the most weightage in Electrochemistry:

  • Cells and Electrode Potential, Nernst Equation - 38 questions (64%)
  • Conductance and Conductivity - 13 questions (22%)
  • Commercial Cells and Batteries - 8 questions (14%)
  • Cells and Electrode Potential, Nernst Equation has produced the most tough questions (7).
6.Is Electrochemistry's weightage in KCET going up or down?

Across all 19 papers analysed, Electrochemistry has averaged about 3.1 questions per paper. In the last three years (2024–2026), that average has risen, at about 3.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.