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Friday, 9 October

JEE Main Chemistry · Electrochemistry

Full Cell Nernst Equation

Full Cell Nernst Equation (Electrochemistry) was asked 6 times in 6 JEE Main shifts, 2021–2026, out of the 42 shifts Lumi analysed. 5 of the 6 had a numerical answer.

Times asked
6
in 6 shifts
Years
2021–2026
Usual format
Numerical value
Calculation
Pattern
Frequent
repeats across shifts

How it is asked

  • Unknown charge from cell emf
  • Ion concentration from cell emf

Difficulty

Easy 0Medium 3Hard 3

Where it sits

Chapter: Electrochemistry. Topic: Nernst Equation, 23 questions over 9 ideas.

Other repeat ideas in this topic

Every time it came

All 6 questions

Newest first, each with its options and official answer.

  1. 4 Apr 2026, Shift 2 · Q73An electrochemical cell, consist of the following two redox couples, Mx+(aq)/M(s)\mathrm{M^{x+}(aq)/M(s)} [Ered⊖=+0.15 V][E^\ominus_{red}=+0.15\ \mathrm{V}] and…HardNumerical value
  2. 5 Apr 2026, Shift 2 · Q57One half cell in a voltaic cell is constructed by dipping silver rod in AgNO3\mathrm{AgNO_3} solution of unknown concentration, other half…MediumSingle correct
  3. 7 Apr 2025, Shift 1 · Q711 Faraday electricity was passed through Cu2+\mathrm{Cu^{2+}} (1.5 M, 1 L) /Cu and 0.1 Faraday was passed through Ag+\mathrm{Ag^+} (0.2 M, 1…HardNumerical valueHas a figure
  4. 25 Jul 2022, Shift 1 · Q84The cell potential for Zn∣Zn2+(aq)∥Snx+∣ Sn\mathrm{Zn|Zn^{2+}(aq)\|Sn^{x+}|\,Sn} is 0.8010.801 V at 298 K. The reaction quotient for the above reaction is…MediumNumerical value
  5. 24 Jun 2022, Shift 1 · Q84The cell potential for the following cell Pt ∣H2(g)∣H+(aq)∥ Cu2+(0.01 M)∣Cu(s)\mathrm{Pt\,|H_2(g)|H^+(aq)\|\ Cu^{2+}(0.01\ M)|Cu(s)} is 0.576 V at 298 K. The pH of the…MediumNumerical value
  6. 25 Jul 2021, Shift 1 · Q58Consider the cell at 25∘^\circC Zn∣Zn2+(aq),(1 M) ∣∣ Fe3+(aq),Fe2+(aq)∣Pt(s)\mathrm{Zn|Zn^{2+}(aq),(1\ M)\,||\,Fe^{3+}(aq),Fe^{2+}(aq)|Pt(s)} The fraction of total iron present as…HardNumerical value