UPSEE Solved Model Paper 2

Write balance reaction for electrolysis of water and use Faraday's law and mole concept.
2H2O ⇌ 4H++2O2−
At cathode, 4H++4e− → 2H2
At anode, 2O2−−4e− → O2
∴ 4 faraday of charge liberates = 1 mol
= 22.4 dm3O2
∴ 1 faraday of charge liberates =

22.4

4

×1
= 5.6 dm3O2