Standard electrode potential of three metal `X, Y` and `Z` are `-1.2 V, +0.5 V` and `-3.0 V` respectively. The reducing power of these metals will be:

Options

A. `ZgtXgtY`
B. `XgtYgtZ`
C. `YgtZgtX`
D. `YgtXgtZ`.

Answer

A

Explanation

R.P . Of X=-1.2V
R.P. of Y=+0.4Y
R.P. of Z=-3.0V
More the R.P. easier to reduce i.e. it is a stronger O.A. or weaker R.A. ltbr. Thus R.P `prop(1)/("reducing power")`
Thus correct order of reduc ing power is:
`ZgtXgtY`