For lead storage battery pick the correct statements A. During charging of battery, PbSO4 on anode i — JEE Mains Chemistry Past Papers Chemistry Question
Question
For lead storage battery pick the correct statements A. During charging of battery, PbSO4 on anode is converted into PbO2 B. During charging of battery, PbSO4 on cathode is converted into PbO2 C. Lead storage battery consists of grid of lead packed with PbO2 as anode D. Lead storage battery has 38% solution of sulphuric acid as an electrolyte Choose the correct answer from the options given below: (A) B, C, D only (B) A, B, D only (C) B. C only (D) B, D only
💡 Solution & Explanation
Lead storage batteries used is automobiles (Cars/bikes): Anode : Pb(s) Cathode : PbO2(s) H2SO4(conc.) about 38% solution of H2SO4 is taken as an electrolyte. Anode : Pb(s) Pb2+ (aq) + 2e– Pb2+(aq) + 4 SO (aq) PbSO4(s) Pb(s) + 4 SO (aq) PbSO4 + 2e– Most of the PbSO4(s) ppt sticks to the lead rod. Cathode : 2e– + 4H+ + PbO2(s) Pb2+(aq) + 2H2O() Pb2+(aq) + 4 SO (aq) + 4H+ + 2e– PbSO4(s) + 2H2O() PbSO4(s) sticks to cathode rod. Pb(s) + PbO2 + 4H+ + 2 4 SO (aq) 2PbSO4(s) + 2H2O() Ecell = 2.05 V | JEE(Main) 2023 | DATE : 12-04-2023 (SHIFT-1) | PAPER-1 | OFFICIAL | CHEMISTRY PAGE # 11