Starting from elemental sulphur, how is `H_(2)SO_(4)` prepared ?

1.	Starting from elemental sulphur, how is `H_(2)SO_(4)` prepared ?
Answer» Manufacture of `H_(2)SO_(4)` by contact process : Manufacturing of `H_(2)SO_(4)` involves three main steps, Step - I `SO_(2)` production : The required `SO_(2)` for this process is obtained by burning S(or) Iron pyrites in oxygen. `S+O_(2)toSO_(2)` `4FeS_(2)+15O_(2)to2Fe_(2)O_(3)to2Fe_(2)O_(3)+8SO_(3)` Step - 2 `SO_(3)` formation : `SO_(2)` is oxidised in presence of catalyst with atmospheric airto form `SO_(3)` `2SO_(2(g))+O_(2(g))underset(Delta)overset("catalyst")iff2SO_(3(g))` Step - 3 Formation of `H_(2)SO_(4)` : `SO_(3)` formed in the above step absorbed in `98% H_(2)SO_(4)` to get oleum `(H_(2)S_(2)O_(7))`. This oleum is diuted to get desired concentration of `H_(2)SO_(4)`. `SO_(3)+H_(2)SO_(4)toH_(2)S_(2)O_(7)` `H_(2)S_(2)O_(7)+H_(2)Oto 2H_(2)SO_(4)`

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Starting from elemental sulphur, how is `H_(2)SO_(4)` prepared ?

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