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In which of the following reactions, H(...

In which of the following reactions, `H_(2)O_(2)` is acting as a reducing agent?

A

`H_(2)O_(2)+SO_(2)rarr H_(2)SO_(4)`

B

`2KI+H_(2)O_(2)rarr 2KOH+I_(2)`

C

`PbS+4H_(2)O_(2)rarr PbSO_(4)+4H_(2)O`

D

`Ag_(2)O+H_(2)O_(2)rarr 2Ag +H_(2)O+O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`SO_(2)` changes of `H_(2)SO_(4)` (O.N. change from `+4" to "+6` oxidation)
`2KI+I_(2)" (O.S. change from -1 to 0 oxidation")`
`PbS rarr PbSO_(3)" (O.S. changes from -2 to +6 oxidation)"`
`Ag_(2)Orarr 2Ag" (O.S. changes from +1 to 0 reduction)"`
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