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  4. The standard reduction potential values of three metallic cations, X, Y, Z are 0.52, - 3.03 and - 1.18 V respectively. The order of reducing power of the corresponding metals is

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Q. The standard reduction potential values of three metallic cations, $X, Y, Z$ are $0.52, - 3.03$ and $- 1.18 \,V$ respectively. The order of reducing power of the corresponding metals is

IIT JEEIIT JEE 1998Electrochemistry

Solution:

Lower the value of $E^{\circ}$, stronger the reducing agent. Reducing power:
$Y\left(E^{\circ}=-3.03 V \right) >Z\left(E^{\circ}=-1.18 V \right) >X\left(E^{\circ}=0.52\, V \right)$