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On large scale, \( \mathrm{H}_{2} \mathrm{O}_{2} \) is prepared by hydrolysis of peroxydisulphuric acid obtained by electrolysis of \( 50 \% \mathrm{H}_{2} \mathrm{SO}_{4} \). The strength of \( \mathrm{H}_{2} \mathrm{O}_{2} \) is expressed in number of ways namely normality, molarity, percentage strength and volume strength. Volume strength refers to the volume of \( \mathrm{O}_{2} \) obtained at NTP by decomposition of \( 1 \mathrm{~mL} \) of \( \mathrm{H}_{2} \mathrm{O}_{2} \) solution.
Hydrolysis of one mole of peroxydisulphuric acid gives:
(A) two moles of \( \mathrm{H}_{2} \mathrm{SO}_{4} \)
(B) two moles of Caro's acid
(C) one mole of \( \mathrm{H}_{2} \mathrm{SO}_{4} \) and one mole of \( \mathrm{H}_{2} \mathrm{SO}_{5} \)
(D) one mole of \( \mathrm{H}_{2} \mathrm{SO}_{4} \), one mole of \( \mathrm{H}_{2} \mathrm{SO}_{5} \) and one mole of \( \mathrm{H}_{2} \mathrm{O}_{2} \)
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