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Which is stronger reducing agent Cr^(+2)...

Which is stronger reducing agent `Cr^(+2)` or `Fe^(+2)` ?

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`Cr^(+2)` is a stronger reducing agent then `Fe^(+2)` because `E^(6) (Cr^(+3)//Cr^(+2))` is - ve (- 0.41 V) whereas `E^(@)(Fe^(+3)//Fe^(+2))` is positive i.e., (0.77 V). Thus, `Cr^(+2)` is easily oxidised to `Fe^(+)Cr^(+3)` but `Fe^(+2)` cannot be easily oxidised to `Fe^(+3)` comparatively. Hence, `Cr^(+2)` is a stronger reducing agent than `Fe^(+2)`.
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Which is a stronger reducing agent Cr^(+2) or Fe^(+2) and why ? E^(@)(Cr^(+3)//Cr^(+2))=-0.4//V and E^(@)(Fe^(+3)//Fe^(+2)) is 0.77V.

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Knowledge Check

  • …………………… is a good reducing agent.

    A
    contains replaceable `H^(+)` ion
    B
    `CO_(2)`
    C
    `[Cr(CO)_(6)]`
    D
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  • Using the data given below find out the strongest reducing agent E_(Cr_(2)O_(7)^(2-))^(@)Cr^(3+)=1.33V," "E_(Cl_(2)//Cl^(-))^(@)=1.36V E_(MnO_(4)^(-))^(@)//Mn^(2+)=1.51V, E_(Cr^(3+)//Cr)^(@)=-0.74V

    A
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    B
    `Cr^(3+)`
    C
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    D
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  • Ca is a good reducing agent, because

    A
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    B
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    C
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    D
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