Question

Electrochemical series is a series of elements arranged in increasing order of their reduction potential and $E_{H^{+}/H_2}^0=0$. The metals above $H_2$ have – ve reduction potential, they are more reactive than hydrogen whereas metals below hydrogen are less reactive than $H_2$. Reduction potential of metal depends upon
(i) sublimation energy (ii) ionization energy and (iii) hydration energy of ions.

Which of the following is best reducing agent?

• A. Li
• B. Na
• C. K
• D. Cs

Answer 1

The correct option is A

Li

Li is best reducing agent because it has lowest standard potential and secondly $L{i}^{+}$ is most stable due to greater hydration energy.