EcellΘ for some half cell reactions are given below. On the basis of these mark the correct answer. (1) H+(aq)+e-→12H2(g);EcellΘ=0.00V( ii) 2H2O(l)→O2(g)+4H+(aq)+4e-;EcellΘ=1.23V (iii) 2SO42-(aq)→S2O82-(aq)+2e-;Ecell Θ=1.96 V