1.

In which of the following reactions H_(2)O_(2)does not act as an reducing agent ?

Answer»

`I_(2)+H_(2)O_(2)+2OH^(-) to 2I^(-) +2H_(2)O+O_(2)`
`PbS+4H_(2)O_(2) to PbSO_(4) +4H_(2)O`
`2KMnO_(4)+3H_(2)O_(2) to 2MnO_(2) +2KOH +2H_(2)O+3O_(2)`
`HOCl+H_(2)O_(2) to H_(3)O^(+) +CL^(-)+O_(2)`

Solution :
Oxygen of `H_(2)O_(2)` (-1) is coverted to (-2) of `H_(2)O`. There is reduction. `H_(2)O_(2)` is oxidising agent.
(A), (B), (D) : `underset(2(-1))underset(""darr)(H_(2)O_(2))to underset(2(O))underset(UARR)(O_(2))+2e`...Oxidation


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