| JEE MAIN-2022 | DATE : 28-07-2022 (SHIFT-1) | PAPER-1 | | CHEMISTRY PAGE # 2 — JEE Mains Chemistry Past Papers Chemistry Question

💡 Solution & Explanation

Zn(Hg) + HgO(s)  ZnO(s) + Hg(l) – Primary cell Pb(s) + PbO2(s) + 2H2SO4(aq)  2PbSO4(s) + 2H2O(l) – discharging reaction of Secondary cell 2H2(g) + O2(g)  2H2O(l) – Fuel cell Cd(s) + 2Ni(OH)3(s)  CdO(s) + 2Ni(OH)2(s) + H2O(l) – Secondary cell