Question

The standard reduction electrode potential values of the elements A, B and C are +0.68, −2.50 and −0.50 V respectively. The order of their reducing power is ______.

Options

• A > B > C

• A > C > B

• C > B > A

• B > C > A

Answer 1

The standard reduction electrode potential values of the elements A, B and C are +0.68, −2.50 and −0.50 V respectively. The order of their reducing power is B > C > A.

Explanation:

A lower (more negative) standard reduction potential means a higher tendency to lose electrons, i.e., greater reducing power. Since B (−2.50 V) < C (−0.50 V) < A (+0.68 V), the reducing power follows the order: B > C > A.