Question

Standard electrode potential of three metals X, Y and Z are – 1.2 V, + 0.5 V and – 3.0 V, respectively. The reducing power of these metals will be:

Options

• Y > Z > X

• X > Y > Z

• Z > X > Y

• Z > X > Y

Answer 1

Z > X > Y

Explanation:

As the value of standard reduction potential decreases the reducing power increases i.e.,

\[\ce{\underset{(- 3.0)}{Z} > \underset{(- 1.2)}{X} > \underset{(+ 0.5)}{Y}}\]