Peroxydisulphuric acid and its salts are powerful oxidizing agents. Thus it can be estimated reducing agents and also study the kinetics of the reaction.

Peroxydisulphuric acid:

is also called Marshall's acid

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has two peroxy linkages

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liberates

I_{2}

with

K I

in a fast reaction

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has oxidation number of sulphur as

+ 7

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Solution

The correct option is B is also called Marshall's acid

The structure of peroxydisulphuric acid is also called Marshall's acid. Here, S atom is in +6 oxidation state and as can be seen from figure there is only one peroxy linkage.

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