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Complete the following equations : (i)...

Complete the following equations :
(i) `5SO_(2)+2MnO_(4)^(-)+2H_(2)Orarr 5SO_(4)^(2-)+4H^(+)+?`
(ii) `SO_(3)+"Conc. "H_(2)SO_(4)rarr`?

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(i) `5SO_(2)+2MnO_(4)^(2-)+2H_(2)Orarr 5SO_(4)^(2-)+4H^(+)+2Mn^(++)`
(ii) `SO_(3)"conc. "H_(2)SO_(4)rarr H_(2)S_(2)O_(7)`
(iii) `2KClO_(3) overset(MnO_(2), Delta)rarr 2KCl +3O_(2)`
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