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Q.

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

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a

In dilute sulphuric acid acid solution, hydrogen ion will be reduced at cathode

b

In concentrated sulphuric acid solution, water will be oxidized at anode

c

In dilute sulphuric acid solution, water will be oxidized at anode

d

in dilute sulphuric acid solution, SO42−ion will be oxidized to tetrathionate ion at anode.

answer is A.

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Detailed Solution

greater oxidation potential greater the tendency of undergoing oxidationgreater reduction potential greater the tendency of undergoing reduction
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