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E^(@) values of Mg^(2+) //Mg is -2.37V, ...

`E^(@)` values of `Mg^(2+) //Mg` is -2.37V, of `Zn^(2+)//Zn` is -0.76V and `Fe^(2+) //Fe` is -0.44V.
Which of the following statement is correct ?

A

Zn will reduce `Fe^(2+)`

B

Zn will reduce `Mg^(2+)`

C

Mg oxidises Fe

D

Zn oxidises Fe

Text Solution

Verified by Experts

The correct Answer is:
d
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Given the standard electrode potentials, K^(+) // K = - 2.93 V, Ag^(2+) //Ag = 0.80 V Hg^(2+) //Hg = 0.79 V , Mg^(2+) //Mg = - 2.37 V, Cr^(3+) //Cr = - 0.74 V Arrange these metals in their increasing order of reducing power.

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Knowledge Check

  • E^@ of Mg^(2+)|Mg,Zn^(2+)|Zn and Fe^(2+)| Fe are +2.37V,-0.76V and -0.44V respectively. Which of the following is correct :

    A
    Mg oxidises Fe
    B
    `Zn oxidises Fe`
    C
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    D
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    A
    `Mg oxidises Fe`
    B
    `Zn oxidises Fe`
    C
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    A
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    B
    `Zn` oxidises `Fe`
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