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ICSE Class 10 Chemistry 2015 Paper

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Question : 71 of 85
Marks: +1, -0
In the contact process for the manufacture of sulphuric acid give the equations for the conversion of sulphur trioxide to sulphuric acid.
Solution:  
SO3+  H2SO4   (Conc.)     →H2S2O7Oleum\mathrm{SO}_3 + \; \underset{\;\text{ (Conc.) }\;}{\mathrm{H}_2\mathrm{SO}_4} \; \rightarrow \underset{\mathrm{Oleum}}{\mathrm{H}_2\mathrm{S}_2\mathrm{O}_7}
H2S2O7+H2O→H2SO4\mathrm{H}_2\mathrm{S}_2\mathrm{O}_7 + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{H}_2\mathrm{SO}_4
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