Electrochemistry — JEE Main Previous Year Questions

How many JEE Main questions come from Electrochemistry?

Electrochemistry has contributed 188 questions to Joint Entrance Examination (Main) papers between 2016 and 2026 — an average of about 17 questions a year. That count is measured from EByAi’s bank of 55,289 JEE Main questions, not estimated from a syllabus. Every one of the 188 questions carries a written, step-by-step solution, and each is tagged to Electrochemistry within Chemistry, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Electrochemistry questions from real JEE Main papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 188 Electrochemistry questions (with full written solutions) are available in practice.

1. Question 1 · JEE Main 2025

   For a Mg | Mg²⁺ (aq) || Ag⁺ (aq) | Ag the correct Nernst Equation is:
   1. (A)${\mathrm{E}}_{\text{cell }}={\mathrm{E}}_{\text{cell }}^{\mathrm{o}}-\frac{\mathrm{RT}}{2\mathrm{F}}\ln \frac{{\left[{\mathrm{Ag}}^{+}\right]}^2}{\left[{\mathrm{Mg}}^{2+}\right]}$
   2. (B)${\mathrm{E}}_{\text{cell }}={\mathrm{E}}_{\text{cell }}^{\mathrm{o}}-\frac{\mathrm{RT}}{2\mathrm{F}}\ln \frac{\left[{\mathrm{Mg}}^{2+}\right]}{\left[{\mathrm{Ag}}^{+}\right]}$
   3. (C)${\mathrm{E}}_{\text{cell }}={\mathrm{E}}_{\text{cell }}^{\mathrm{o}}-\frac{\mathrm{RT}}{2\mathrm{F}}\ln \frac{\left[{\mathrm{Ag}}^{+}\right]}{\left[{\mathrm{Mg}}^{2+}\right]}$
   4. (D)${\mathrm{E}}_{\text{cell }}={\mathrm{E}}_{\text{cell }}^{\mathrm{o}}+\frac{\mathrm{RT}}{2\mathrm{F}}\ln \frac{{\left[{\mathrm{Ag}}^{+}\right]}^2}{\left[{\mathrm{Mg}}^{2+}\right]}$
   Show answerAnswer

   Answer: (D) ${\mathrm{E}}_{\text{cell }}={\mathrm{E}}_{\text{cell }}^{\mathrm{o}}+\frac{\mathrm{RT}}{2\mathrm{F}}\ln \frac{{\left[{\mathrm{Ag}}^{+}\right]}^2}{\left[{\mathrm{Mg}}^{2+}\right]}$

2. Question 2 · JEE Main 2025

   Correct order of limiting molar conductivity for cations in water at 298 K is :
   1. (A)${\mathrm{H}}^{+}>{\mathrm{Na}}^{+}>{\mathrm{K}}^{+}>{\mathrm{Ca}}^{2+}>{\mathrm{Mg}}^{2+}$
   2. (B)${\mathrm{H}}^{+}>{\mathrm{Ca}}^{2+}>{\mathrm{Mg}}^{2+}>{\mathrm{K}}^{+}>{\mathrm{Na}}^{+}$
   3. (C)${\mathrm{Mg}}^{2+}>{\mathrm{H}}^{+}>{\mathrm{Ca}}^{2+}>{\mathrm{K}}^{+}>{\mathrm{Na}}^{+}$
   4. (D)${\mathrm{H}}^{+}>{\mathrm{Na}}^{+}>{\mathrm{Ca}}^{2+}>{\mathrm{Mg}}^{2+}>{\mathrm{K}}^{+}$
   Show answerAnswer

   Answer: (B) ${\mathrm{H}}^{+}>{\mathrm{Ca}}^{2+}>{\mathrm{Mg}}^{2+}>{\mathrm{K}}^{+}>{\mathrm{Na}}^{+}$

3. Question 3 · JEE Main 2025

   The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.
   1. (A)$E_{{\text{Sn}}^{4+}/{\text{Sn}}^{2+}}^o=+1.15\text{ V}$
   2. (B)$E_{{\text{Al}}^{3+}/\text{Al}}^o=-1.66\text{ V}$
   3. (C)$E_{{\text{Pb}}^{4+}/{\text{Pb}}^{2+}}^o=+1.67\text{ V}$
   4. (D)$E_{{\text{Tl}}^{3+}/\text{Tl}}^o=+1.26\text{ V}$
   Show answerAnswer

   Answer: (C) $E_{{\text{Pb}}^{4+}/{\text{Pb}}^{2+}}^o=+1.67\text{ V}$

4. Question 4 · JEE Main 2025

   Given below are two statements: Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode. Statement (II) : The rate of corrosion is more in alkaline medium than in acidic medium. In the light of the above statements, choose the correct answer from the options given below:
   1. (A)Both Statement I and Statement II are true
   2. (B)Both Statement I and Statement II are false
   3. (C)Statement I is true but Statement II is false
   4. (D)Statement I is false but Statement II is true
   Show answerAnswer

   Answer: (C) Statement I is true but Statement II is false

5. Question 5 · JEE Main 2025

   Match List - I with List - II : List - I (Applications) List - II (Batteries/Cell) (A) Transistors (I) Anode - Zn/Hg; Cathode - HgO + C (B) Hearing aids (II) Hydrogen fuel cell (C) Inverters (III) Anode - Zn; Cathode - Carbon (D) Apollo space ship (IV) Anode - Pb; Cathode - Pb | PbO 2 Choose the correct answer from the options given below :
   1. (A)(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
   2. (B)(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
   3. (C)(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
   4. (D)(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
   Show answerAnswer

   Answer: (A) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Electrochemistry questions by year

FAQs

More JEE Main Chemistry chapters

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