The purity of `H_(2)SO_(4)` obtained by contact process is

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Answer :

The purity of `H_(2)SO_(4)` obtained by contact process is A. `96-98%` B. `92-96%` C. `92-94%` D. `100%`

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Description : How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) `SO_(4)^(2-)` (iii) `Fe_(2) (SO_(4))_(3)`

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