1.

H_(2)O_(2) cannot oxide

Answer»

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

SOLUTION :`H_(2)O_(2)` OXIDISES `Na_(2)SO_(4)`, KI to `I_(2),` PbSto `PbSO_(4)` but reduces `O_(3)` to `O_(2)`


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