Among the following, the correct formula of Marshall's acid is

Options

A $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_6$
B $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$
C $\mathrm{H}_2 \mathrm{SO}_4$
D $\mathrm{H}_2 \mathrm{SO}_5$

Correct answer

B. $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$

Step-by-step solution

The correct formula of Marshall's acid is

\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8

. It is known as peroxodisulphuric acid having sulphur ( S ) in +6 oxidation state. The structure of this acid is shown below: Among the following, the correct formula of Marshall's acid is

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