Question

The standard reduction potential value of three metallic cations X, Y and Z are 0.52, - 3.303 and – 1.18 V respectively. The order of reducing power of the corresponding metals 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

Reducing power depends on how easily the ions themselves get oxidised. Since we have the reduction potential values, we need to flip their sign to get oxidation potential values and arrange them in descending order.

This gives us Y (3.303) > Z (1.18) > X (-0.52)