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Which of the following reaction is preferred at anode during the electrolysis of \( \mathrm{H}_{2} \mathrm{SO}_{4} \) at higher concentration?
(a) \( 2 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{O}_{2}(\mathrm{~g})+4 \mathrm{H}^{+}(a q)+4 e^{-} \)
(b) \( 2 \mathrm{SO}_{4}^{2-}(\mathrm{aq}) \longrightarrow \mathrm{S}_{2} \mathrm{O}_{8}^{2-}(\mathrm{aq})+2 e^{-} \)
(c) Both (a) and (b)
(d) None of these
\( \mathrm{P} \)
W
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