The oxidation states of sulphur in Caro's and Marshall's acid are:

+ 6, + 6

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+ 4, + 6

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+ 6, - 6

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+ 6, + 4

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Solution

The correct option is D $+ 6, + 6$
$H_{2} O_{5}$ Caro's Acid $H - O - O | | S | | O - O - O - H$ . $(+ 6) S t a t e$
$H_{2} S_{2} O_{8}$ Marshall's Acid
$H - O - O | | S | | O - O - O - O | | S | | O - O - H$ $(+ 6) S t a t e$
Both these acids have peroxy link.

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N a_{2} S_{4} O_{6}

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K_{2} C r_{2} O_{7} + S O_{2} H^{+} - - \to

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