JEE-Level Practice: Electrochemistry

This is a focused JEE Main / Advanced practice quiz on Electrochemistry — Nernst-equation and concentration-cell numericals, the EE^\circ-ΔG\Delta G-KcK_c links, molar-conductivity and degree-of-dissociation calculations, and multi-step Faraday's-law electrolysis. Keep F=96500F = 96500, the 0.0590.059 factor and Λm=κ×1000/c\Lambda_m = \kappa \times 1000/c ready. Each question has a worked explanation.