JEE Advanced Chemistry question

Out of H2S2O3, H2S4O6, H2SO5 and H2S2O8 peroxy acids are

(A)H2S2O3, H2S4O6
(B)H2S4O6, H2SO5
(C)H2SO5, H2S2O8Correct
(D)H2S2O3 and H2S2O8

Answer: (C)

Solution

H2SO5 (peroxymonosulphuric/Caro's acid, HO–O–SO2–OH) and H2S2O8 (peroxydisulphuric/Marshall's acid, HO3S–O–O–SO3H) each contain a genuine O–O peroxide linkage.

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Question ID VK-159338