1.

Which cannot be oxidised by H_(2)O_(2)?

Answer»

`Na_(2)SO_(3)`
PBS
KI
`O_(3)`

Solution :`Na_(2)SO_(3)` is oxidised by `H_(2)O_(2)" to "Na_(2)SO_(4).PbS` is oxidised by `H_(2)O_(2)" to "PbSO_(4).KI` is oxidised by `H_(2)O_(2)" to "I_(2)O_(3)` cannot be oxidised by `H_(2)O_(2)` but it is reduced to `O_(2)" by "H_(2)O_(2)`.
`H_(2)O_(2)+O_(3) RARR H_(2)O+2O_(2)`


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