Jump to a section

Chemistry - Electrochemistry

Practise 46 AIIMS previous year questions on Electrochemistry, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Electrochemistry has been asked in 18 of the 19 years of AIIMS papers analysed (2001–2019), with 46 questions in all. 39% of them were easy, 43% moderate and 17% tough. Most of its questions came from 2018, with 6 questions that year. In the last three years (2017–2019) it had 10 questions across 5 papers, about 2 per paper.

The chapter's 4 topics are not weighted equally: Cells and Electrode Potential, Nernst Equation (29 questions, 63%), Conductance and Conductivity (9 questions, 20%), and Commercial Cells and Batteries (5 questions, 11%) have been asked the most. Cells and Electrode Potential, Nernst Equation has produced the most tough questions (7).

  1. 1Calculate emf of the following cell at if value of is (Given ) :25 May, 2019Cells and Electrode Potential, Nernst Equation
  2. 2solution is present in a conductivity cell with electrode of area placed apart and resistance observed is . What is the molar conductivity o27 May, 2018Conductance and Conductivity
  3. 3Assertion : Molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally. Reason : Kohlrausch law helps27 May, 2018Conductance and Conductivity
  4. 4Assertion : Electrolysis of produces metal. Reason : is obtained at cathode.27 May, 2018Cells and Electrode Potential, Nernst Equation
  5. 5Cell equation : and at for cell reactions. Find for . Given at26 May, 2018Cells and Electrode Potential, Nernst Equation
  6. 6Time taken to completely decompose of water by passing current is26 May, 2018Cells and Electrode Potential, Nernst Equation
  7. 7Assertion : Reverse current flows in charging of lead storage battery. Reason : During charging, converts into and .26 May, 2018Commercial Cells and Batteries
  8. 8appropriate molar conductances of the electrolytes listed in the given table at infinite dilution in at .2017Conductance and Conductivity
  9. 9On the basis of standard electrode potential of redox couples given below, find out which of the following is the strongest oxidising agent.2017Cells and Electrode Potential, Nernst Equation
  10. 10Assertion : If standard reduction potential for the reaction is 0.80 volt, then for the reaction , it will be 1.60 volt. Reason: If concentr2017Cells and Electrode Potential, Nernst Equation
  11. 11How many Faradays of electricity are required for the given reaction to occur?2016Cells and Electrode Potential, Nernst Equation
  12. 12A conductivity cell has a cell constant of . This cell when filled with solution has a resistance of at . Calculate the equivalent conductan2016Conductance and Conductivity
  13. 13Assertion : In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different from that required for 1 mole o2016Cells and Electrode Potential, Nernst Equation
  14. 14What is the amount of chlorine liberated when of current is passed for 60 minutes in an aqueous solution of ?2015Cells and Electrode Potential, Nernst Equation
  15. 15Assertion : Zinc displaces copper from copper sulphate solution. Reason : The of is and that of is .2015Cells and Electrode Potential, Nernst Equation
  16. 16Assertion : Pure iron when heated in dry air is covered with a layer of rust. Reason : Rust has the composition .2015Corrosion
  17. 17Which cell will measure standard electrode potential of copper electrode?2014Cells and Electrode Potential, Nernst Equation
  18. 18Assertion: Conductivity of all electrolytes decreases on dilution. Reason: On dilution number of ions per unit volume decreases.2014Conductance and Conductivity
  19. 19Electrode potential of hydrogen electrode is , then is2013Cells and Electrode Potential, Nernst Equation
  20. 20Assertion : Magnesium is extracted by the electrolysis of fused mixture of and . Reason : Calcium chloride acts as a reducing agent.2013Cells and Electrode Potential, Nernst Equation
  21. 21For then EMF of the cell (1 atm) will be2012Cells and Electrode Potential, Nernst Equation
  22. 22Assertion : A reaction is spontaneous if ve. Reason : For is always -ve.2011Cells and Electrode Potential, Nernst Equation
  23. 23A factory produces of calcium in two hours by electrolysis. How much aluminium can be produced by same current in 2 hours if current efficie2010Cells and Electrode Potential, Nernst Equation
  24. 24Calculate using appropriate molar conductances of the electrolytes listed above at infinite dilution in at .2010Conductance and Conductivity
  25. 25For the electrochemical cell, , and . From this data one can deduce that2010Cells and Electrode Potential, Nernst Equation
  26. 26The specific conductance of a N/10 KCl at is . The resistance of cell containing solution at the same temperature was found to be . The cell2009Conductance and Conductivity
  27. 27Hydrofluoric acid is a weak acid. At , the molar conductivity of is . If its . Equilibrium constant at the given concentration is2009Conductance and Conductivity
  28. 28The time period to coat a metal surface of \(80 {~cm}^2\) with \(5 10^{-3} {~cm}\) thick layer of silver (density \(1.05 {~g} {~cm}^{-3}\) )2008Cells and Electrode Potential, Nernst Equation
  29. 29For the following concentration cell, to be spontaneous \( {Pt} ( {H}_2 ) P_1\) atm. \(| {HCl}| {Pt} ( {H}_2 ) P_2\) atm. Which of the follo2008Cells and Electrode Potential, Nernst Equation
  30. 30The standard oxidation potential \(E^{ }\) for the half cell reaction are \[ {array}{ll} {Zn} {Zn}^{2+}+2 e^{-} ; & E^{ }=+0.76 {~V} \\ {Fe}2008Cells and Electrode Potential, Nernst Equation
  31. 31To observe the effect of concentration on the conductivity of electrolytes of different nature were taken in two vessels \(A\) and \(B . A\)2008Conductance and Conductivity
  32. 32Assertion : Copper metal gets readily corroded in acidic aqueous solution. Reason : Free energy change for this process is negative.2008Corrosion
  33. 33Assertion : Copper sulphate solution is not stored in zinc vessel. Reason : Zinc forms complex with \( {CuSO}_4\).2007Commercial Cells and Batteries
  34. 34The charge required for the reduction of of to is2006Cells and Electrode Potential, Nernst Equation
  35. 35The products formed when an aqueous solution of is electrolysed in a cell having inert electrodes are2006Cells and Electrode Potential, Nernst Equation
  36. 36Assertion : For the Daniel cell, with , the application of opposite potential greater than results into flow of electron from cathode to ano2006Commercial Cells and Batteries
  37. 37The chemical reaction, taking place in a galvanic cell is represented by the notation2005Cells and Electrode Potential, Nernst Equation
  38. 38Assertion : Galvanised iron does not rust. Reason : Zinc has a more negative electrode potential than iron.2005Cells and Electrode Potential, Nernst Equation
  39. 39Which of the following statements is true for the electrochemical Daniell cell?2004Commercial Cells and Batteries
  40. 40Assertion : Copper metal gets readily corroded is an acidic aqueous solution. Reason : Free energy change for this process is positive.2004Corrosion
  41. 41Which of the following reactions is used to make a fuel cell?2003Commercial Cells and Batteries
  42. 42Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through aqueous solution of aluminium ion is2003Cells and Electrode Potential, Nernst Equation
  43. 43A spoon to be electroplated with gold should be2001Cells and Electrode Potential, Nernst Equation
  44. 44How many electrons are delivered at the cathode during electrolysis by a current of in 60 seconds?2001Cells and Electrode Potential, Nernst Equation
  45. 45The number of moles of electrons required to deposit equivalent aluminium (atomic wt. ) from a solution of aluminium chloride will be2001Cells and Electrode Potential, Nernst Equation
  46. 46The equilibrium constant of a reaction is 300 . If the volume of a reaction flask is trippled, the equilibrium constant will be2001Cells and Electrode Potential, Nernst Equation

Frequently Asked Questions

1.How many questions are available for Electrochemistry?

This chapter includes 46 questions compiled from AIIMS papers spanning 2001 to 2019.

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

These are AIIMS questions specifically for the Electrochemistry chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Electrochemistry an important chapter for AIIMS Chemistry?

Electrochemistry has appeared in 18 of the 19 years of AIIMS papers covered here, with 46 questions across 19 papers - about 2 per paper it appears in.

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

Of the 46 questions analysed for this chapter, 39% are easy, 43% moderate and 17% tough. 2018 had the most, with 6 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 - 29 questions (63%)
  • Conductance and Conductivity - 9 questions (20%)
  • Commercial Cells and Batteries - 5 questions (11%)
  • Cells and Electrode Potential, Nernst Equation has produced the most tough questions (7).
6.Is Electrochemistry's weightage in AIIMS going up or down?

Across all 19 papers analysed, Electrochemistry has averaged about 2.4 questions per paper. In the last three years (2017–2019), that average has fallen, at about 2.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.