Question

Standard reduction electrode potentials of three metals A, B and C are +0.5V, –3.0V and –1.2V respectively. The reducing power of these metals are

(a) B > C > A 

(b) A > B > C

(c) C > B > A 

(d) A > C > B.

Answer 1

(a) :         A       B         C
E°_red +0.5V –3.0V –1.2V
More is the value of reduction potential, more is the tendency to get reduced, i.e. less is the reducing power.
The reducing power follows the following order:
B > C > A.