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Hydrolysis of 1 mol of peroxodisulphuric acid produces:

1. 2 mol of sulphuric acid.
2. 2 mol of peroxomono sulphuric acid.
3. 1 mol of sulphuric acid and 1 mol of peroxomono sulphuric acid.
4. 1 mol of sulphuric acid, 1 mol of peroxomono sulphuric acid, and 1 mol of hydrogen peroxide.

Correct answer: 2 mol of sulphuric acid.

Solution

Peroxodisulphuric acid (H2S2O8) hydrolyzes by breaking the O–O peroxide linkage, and both sulfur centers end up as sulfate-type acid units. The net result is formation of 2 moles of sulphuric acid per mole of peroxodisulphuric acid.

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