1.

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

Answer»

ZN will REDUCE `Fe^(2+)`
Zn will reduce `mg^(2+)`
Mg oxidises Fe
Zn oxidises Fe

Solution :`E_(Zn^(2+)//Zn)^@ < E_(Fe^(2+)//Fe^(+))^@`, So Zn will reduce `Fe^(2+)`. Zinc cannot reduce `Mg^(2+)` because `E_(Zn^(2+)//Zn)^(@) > E_(Mg^(2+)//Mg^(+))^@`, On similar reason mg and Zn cannot oxidise Fe.


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