Answer :

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

and H2O is oxidized at anode.

2H2O O2 + 4H+ + 4e-

while in a concentrated solution of sulphuric acid, SO2- ions are oxidized to tetrathionate ions.

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Consider Fig. 3.2Chemistry - Exemplar

Consider Fig. 3.2Chemistry - Exemplar

Match the items oChemistry - Exemplar