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प्रश्न
In the contact process for the manufacture of sulphuric acid give the equations for the conversion of sulphur trioxide to sulphuric acid.
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उत्तर
\[\ce{SO3 + H2SO4 -> H2S2O7}\] (oleum or pyrosulphuric acid)
\[\ce{H2S2O7 + H2O -> 2H2SO4}\]
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