Question

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

• A. Y > Z > X
• B. X > Y > Z
• C. Z > Y > X
• D. Z > X > Y

Answer 1

The correct option is A Y > Z > X

The smaller the reduction potential of a substance, the more is its reducing power. (Y > Z > X).

Always remember that reduction potential refers to the ability of a substance to get reduced. So, if the reduction potential is higher, it means the substance gets reduced easily. And it also indirectly means that it has the ability to oxidise other substances more readily.

Reduction potential is higher ⇨ Ability to get reduced is higher ⇒ Oxidising power is higher ⇨ Reducing power is lower
Reduction potential is lower ⇨ Ability to get reduced is lower ⇨ Oxidising power is lower ⇨ Reducing power is higher