Match Column I with Column II — Electrochemistry Chemistry Question

💡 Solution & Explanation

Dilute HCl and dilute NaCl both undergo electrolysis to yield H2 gas at the cathode and O2 gas at the anode. Concentrated NaCl yields H2 at the cathode and Cl2 at the anode (due to the overvoltage of oxygen making Cl2 evolution kinetically favorable). Aqueous AgNO3 yields solid Ag deposited at the cathode (since Ag+ has a higher reduction potential than water) and O2 at the anode. Therefore, correct answer is A-P,Q; B-P,Q; C-Q,R; D-P,S.