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In which of the following reactions H(2)...

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

A

`HOCl + H_(2)O_(2) overset(H^(+)) to H_(3)O^(+) + Cl^(-) + O_(2)`

B

`Mn^(2+) + H_(2)O_(2) overset(OH^(+)) to Mn^(4+) + 2OH^(-)`

C

`2Fe^(2+) + H_(2)O_(2) overset(OH^(-)) to 2Fe^(3+) + 2OH^(-)`

D

`PbS(s) + 4H_(2)O(aq) overset(H^(-)) to PbSO_(4)(s) + 4H_(2)O(l)`

Text Solution

Verified by Experts

The correct Answer is:
A
In the reactions

Oxidation number of oxygen increases from `-1` to 0. Hence, `H_(2)O_(2)` acts as reducing agent.
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In which of the following reactions H_(2)O_(2) acts as reducing agent?

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Knowledge Check

  • In which of the following reactions H_(2)O_(2) acts as a reducing reagent ?

    A
    `PbS_((s))+4H_(2)O_(2(aq)) overset(H^(+))(rarr)PbSO_(4(s))+H_(2)O(l)`
    B
    `HOCl+H_(2)O_(2) overset(H^(+))(rarr) H_(3)O^(+)+ Cl^(-1)+O_(2)`
    C
    `Mn^(2+)+H_(2)O_(2) overset(OH^(-))(rarr) Mn^(4+)+2OH^(-)`
    D
    `2Fe^(2+)+H_(2)O_(2) overset(OH^(-))(rarr) 2Fe^(3+)+2OH^(-)`

  • In which of the following reactions, H_(2)O_(2) act as a reducing agent ?

    A
    `PbO_(2)(s)+H_(2)O_(2)(aq)toPbO(s)+H_(2)O(l)+O_(2)(g)`
    B
    `Na_(2)SO_(3)(aq)+H_(2)O_(2)(aq)toNa_(2)SO_(4)(aq)+H_(2)O(l)`
    C
    `2KI(aq)+H_(2)O_(2)(aq)to2KOH(aq)+I_(2)(s)`
    D
    `KNO_(2)(aq)+H_(2)O_(2)(aq)toKNO_(3)(aq)+H_(2)O(l)`

  • In which of the following reactions, H_(2)O_(2) acts as a reducing reagent?

    A
    `PbO_(2(s))+H_(2)O_(2(aq)) rarr PbO_((s))+H_(2)O_((l))+O_(2(g))`
    B
    `Na_(2)SO_(3(aq))+H_(2)O_(2(aq)) rarr Na_(2)SO_(4(aq))+H_(2)O_((l))`
    C
    `2KI_((aq))+H_(2)O_(2(aq)) rarr 2KOH_((aq))+I_(2(s))`
    D
    All the above

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