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Saturday, 31 October

JEE Main · Chemistry · Electrochemistry

pH Dependence of Electrode Potential

JEE Main asked pH Dependence of Electrode Potential 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2025. It belongs to Nernst Equation, in Electrochemistry (Chemistry). The longest wait between two years asking it was 3 years. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
4 of 8
First asked
2020
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.08’200.07’210.07’220’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20251 of 8
  • 20240 of 18
  • 20230 of 12
  • 20222 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Ph from zero emf of half cell
  • Electrode potential at given ph

Difficulty

Easy 1Medium 4Hard 1

5 of the 6 questions had a numerical answer.

Every question

All 6 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 8 Apr 2025, Shift 2 · Q75Consider the following half cell reaction Cr2O72−(aq)+6e−+14H+(aq)⟶2Cr3+(aq)+7H2O(l)\mathrm{Cr_2O_7^{2-}(aq) + 6e^- + 14H^+(aq) \longrightarrow 2Cr^{3+}(aq) + 7H_2O(l)} The…MediumNumerical value
  2. 30 Jun 2022, Shift 1 · Q65In which of the following half cells, electrochemical reaction is pH dependent ?EasySingle correct
  3. 29 Jun 2022, Shift 2 · Q84The cell potential for the given cell at 298 K Pt∣H2 (g,1 bar)∣H+ (aq)∣∣Cu2+ (aq)∣Cu(s)\mathrm{Pt|H_2\,(g,1\ bar)|H^{+}\,(aq)||Cu^{2+}\,(aq)|Cu(s)} is 0.31V. The pH of the…MediumNumerical value
  4. 25 Feb 2021, Shift 2 · Q56Copper reduces NO3−\mathrm{NO_3^-} into NO and NO2\mathrm{NO_2} depending upon the concentration of HNO3\mathrm{HNO_3} in solution. (Assuming…HardNumerical value
  5. 24 Feb 2021, Shift 2 · Q56The magnitude of the change in oxidising power of the MnO4−/Mn2+\mathrm{MnO_4^-/Mn^{2+}} couple is x×10−4x \times 10^{-4} V, if the H+\mathrm{H^+}…MediumNumerical value
  6. 8 Jan 2020, Shift 1 · Q48What would be the electrode potential for the given half cell reaction at pH=5 ? ______.…MediumNumerical value

Shifts: 8 Jan 2020, Shift 1, 24 Feb 2021, Shift 2, 25 Feb 2021, Shift 2, 29 Jun 2022, Shift 2, 30 Jun 2022, Shift 1, 8 Apr 2025, Shift 2.

Same topic

Other ideas in Nernst Equation

Nernst Equation has 16 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas