Redox Reactions and Electrochemistry for JEE

• Oxidation is loss of electrons; occurs at the anode
• Higher reduction potential means stronger oxidising agent
• Kohlrausch's law gives Λ° of weak electrolytes
• Faraday's laws relate charge and mass deposited

• E_cell = E°_cathode − E°_anode
• Nernst: E = E° − (0.059/n) log Q at 298 K
• ΔG° = −nFE°
• Faraday: m = (M/nF) × I × t

Printable Redox Reactions and Electrochemistry formula sheet: formulas, key ideas and traps on one page. Save it as a PDF for offline revision.

• Reversing cathode and anode potentials
• Wrong n in the Nernst equation
• Forgetting molar conductivity rises on dilution

Appears frequently. Nernst equation and conductance questions are regular. Keep 0.059/n handy.

Prerequisites: Mole Concept and Stoichiometry.

Chapter names follow the current rationalised NCERT textbooks. Read these sections before solving PYQs.

Question. A galvanic cell is set up with Ag⁺(0.001 M)|Ag as one half-cell and Cu²⁺(0.1 M)|Cu as the other. Given E°(Ag⁺/Ag) = +0.80 V, E°(Cu²⁺/Cu) = +0.34 V, and 2.303RT/F = 0.059 V at 298 K. Calculate: (a) the EMF of the cell, (b) the mass of copper that would be deposited if 965 C of charge is passed through a Cu²⁺ solution (atomic mass of Cu = 64), and (c) the Gibbs free energy change for the cell reaction.

This example was solved twice independently and both solutions agree.

Full-chapter free lectures picked from YouTube search results by views, from established JEE channels (mostly in Hinglish). Use the subtopic list to jump straight to the part you need (timestamps come from each video's own chapter list). Watch one, then solve PYQs the same day.

• ELECTROCHEMISTRY in One Shot - Full Chapter Revision | Class 12 | JEE Main — JEE Wallah, 2:38:45
  Jump to a subtopic (15)

  • 0:00 Introduction
  • 0:53 electrochemical cell
  • 9:28 salt bridge and it's function
  • 19:22 ∆G and Keq for galvanic cell
  • 23:53 Nernst equation
  • 29:18 concentration cell
  • 34:40 electrochemical series
  • 38:42 characteristics and application of ecs
  • 57:21 electrolytic cell
  • 1:14:41 Faraday law.
  • 1:30:47 Resistance, conductance, resistivity and conductivity of cell
  • 1:45:12 Kohlrausch law
  • 1:56:34 PYQ's
  • 2:24:04 Batteries (theory)
  • 2:36:40 Thank You
• JEE Brief: Electrochemistry | One Shot for JEE Main and Advanced | Sakshi Vora — Vora Classes, 4:49:09

• 10 JEE Main 2026 PYQs on Redox Reactions and Electrochemistry, with solutions.
• Read the chapter in NCERT textbooks (official, free), then solve its NCERT Exemplar (official, free) questions.
• Chapter-wise past questions: JEE Main and Advanced PYQs and question bank.
• Timed practice tests: NTA Abhyas practice tests (official, free) and our free mock tests.
• See it move: interactive simulation.