Question

The standard electrode potentials of four elements A, B, C, D are −3.05, 1.66, −0.40 and 0.80 volts respectively. The highest chemical activity will be shown by ______.

Options

• A

• B

• C

• D

Answer 1

The standard electrode potentials of four elements A, B, C, D are −3.05, 1.66, −0.40 and 0.80 volts respectively. The highest chemical activity will be shown by A.

Explanation:

The more negative the standard electrode potential (E°) of an element, the stronger its reducing power and the higher its chemical reactivity, especially for metals. Since A has the most negative E° value −3.05 V, it has the greatest tendency to lose electrons and hence shows the highest chemical activity.