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Li has the maximum value of ionisation potential among alkali metals. In aqueous medium, Lithium is 

 

Option: 1

Strongest reducing agent

 


Option: 2

Poorest reducing agent

 


Option: 3

Strongest oxidising agent

 


Option: 4

Poorest oxidising agent


Answers (1)

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The ionisation potential value of Lithium is maximum among alkali metals i.e., its tendency to ionise to give \mathrm{Li}^{+} 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 \mathrm{Li}^{+} ions.

 

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Rishabh

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