Hydrolysis of $1mol$ of peroxo disulphuric acid produces.
A.$2mol$ of sulphuric acid
B.$2mol$ of peroxomono sulphuric acid
C.$1mol$ of sulphuric acid and $1mol$ of peroxomono sulphuric acid
D.$1mol$ of sulphuric acid ,$1mol$ of peroxomono sulphuric acid and $1mol$of hydrogen peroxide

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Hint: At first think about the chemical formula of peroxodisulfuric acid and then the reaction of hydrolysis of peroxodisulfuric acid. The chemical formula of peroxo di sulphuric acid is ${H_2}{S_2}{O_8}$.

Complete step by step answer:
The reaction of hydrolysis of one mole of peroxo di sulphuric acid gives,
${H_2}{S_2}{O_8} + {H_2}O \to {H_2}S{O_4} + {H_2}S{O_5}$
From the above reaction we can say that the hydrolysis of one mole of peroxo di sulphuric acid gives one mole of sulphuric acid and one mole of peroxymonosulfuric acid.
So the answer is C.

Additional Information:-Peroxodisulfuric acid is an inorganic compound with the chemical formula ${H_2}{S_2}{O_8}$. It is also called Marshall's acid. It is a sulphur oxo acid. It contains sulphur in $ + 6$ oxidation state and a peroxide group. Its salts are powerful oxidizing agents. Peroxo disulphuric acid is prepared by the reaction of chloro sulphuric acid with hydrogen peroxide. Another method is the moderately concentrated sulphuric acid with platinum electrodes at high current density and voltage. Peroxodisulfuric acid is a hygroscopic colourless solid that is soluble in water.

If the quantity of the peroxodisulfuric acid is not mentioned then it yields different products. Partial hydrolysis of peroxodisulfuric acid gives peroxy mono sulphuric acid and sulphuric acid and the hydrolysis of peroxodisulfuric acid gives hydrogen peroxide and sulphuric acid.