Li has the maximum value of ionisation potential among alkali metals. In aqueous medium, Lithium is
Strongest reducing agent
Poorest reducing agent
Strongest oxidising agent
Poorest oxidising agent
The ionisation potential value of Lithium is maximum among alkali metals i.e., its tendency to ionise to give ions should be the minimum. Therefore, it appears that Lithium should be the poorest reducing agent among all alkali metals.
However, due to small size of Lithium, it has high charge density and thus, large hydration energy. Thus, Lithium is the strongest reducing agent due to the largest value of hydration energy of ions.