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Hydrogen peroxide is a powerful oxidisin...

Hydrogen peroxide is a powerful oxidising agent.
It is an electron acceptor in acidic and alkaline mediums .
`H_(2)O_(2) + 2H^(+) + 2e^(-) rarr H_(2)O` (in acidic medium )
`H_(2)O_(2) + 2e^(-) rarr 2OH^(-)` (in alkaline medium)
It can also act as reducing agent towards powerful oxidising agents . `H_(2)O_(2) rarr 2H^(+) + O_(2) + 2e`
In alkaline medium , however , its reducing nature is more effective . `H_(2)O_(2) + 2OH^(-) rarr 2H_(2)O + O_(2) + 2e^(-)`
In which of the following reactions , `H_(2)O_(2)` acts a reducing agent ?

A

`PbO_(2) + H_(2)O_(2) rarr PbO + H_(2)O + O_(2)`

B

`Na_(2)SO_(3) + H_(2)O_(2) rarr Na_(2)SO_(4) + H_(2)O`

C

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

D

`KNO_(2) + H_(2)O_(2) rarr KNO_(3) + H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
A
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In which of the following reactions, H_(2)O_(2) acts as a reducing agent ?

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Knowledge Check

  • 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 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)`

  • In which of the following reactions, H_(2)O_(2) acts as 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)`

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

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

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

    Hydrogen peroxide is a powerful oxidising agent. It is an electron acceptor in acidic and alkaline mediums . H_(2)O_(2) + 2H^(+) + 2e^(-) rarr H_(2)O (in acidic medium ) H_(2)O_(2) + 2e^(-) rarr 2OH^(-) (in alkaline medium) It can also act as reducing agent towards powerful oxidising agents . H_(2)O_(2) rarr 2H^(+) + O_(2) + 2e In alkaline medium , however , its reducing nature is more effective . H_(2)O_(2) + 2OH^(-) rarr 2H_(2)O + O_(2) + 2e^(-) In which of the following reactions , H_(2)O_(2) acts as an oxidising agent ?

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

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