Question

The standard reduction potential of

Li⁺ /Li, Ba²⁺/Ba, Na⁺ /Na and Mg²⁺/Mg are –3.05, –2.73, – 2.71 and –2.37 volts respectively. Which one of the following is strongest oxidising agent?

(a)  Na⁺

(b)  Li⁺

(c)  Ba²⁺

(d)  Mg²⁺

Answer 1

Correct option  (d) Mg²⁺ 

Explanation:

The strongest oxidising agent is one which has maximum tendency to gain electrons, i.e. whose E°Red is maximum